Podcasts about hubble constant

Why three dimensions? Neil deGrasse Tyson and comedians Chuck Nice and Hasan Minhaj celebrate 100 years of quantum physics and everywhere it's taken us, joined by theoretical astrophysicists Brian Greene and Janna Levin.NOTE: StarTalk+ Patrons can listen to this entire episode commercial-free here: https://startalkmedia.com/show/quantum-quandary-startalk-live-with-brian-greene-janna-levin/Thanks to our Patrons Dr. Philip Forkuo Mensah, robert mihai ticu, Brian Purser, german moreno, Dylan Bell, John Bickford, Rogue Ryter, Ethan Rice, Mi Ra, Jalen Grimble, Nick Salverson, Cranjis McBasketball, Jesse Eisenhardt, Thomas Lanphear, Monica Pena, Tolu, Jim Coulter, Morgan Fisher, Julie Schultz, Paradox, Rico Wyder, Thomas Aasrud, Ralph Leighton, J.C. De la Cruz, James Gallagher, Maverick Blue, Casey, David Bellucci, Cj Purcell, Edward Q Teague, Douglas Cottel, Bach Ong, Stephen Lewis, T_Titillatus, Jonathan, Thoritz, John Weldt, Anthony Gamble, Sergey Masich, Jay Park, Jean, Bradley Bodanis, Kylee Ronning, Oliver Boardman, Lars-Ola Arvidsson, Douglas Burk, Holdin Ross, Danelle Hayes, Chau Phan, Mark Caffarel, Eric Turnbull, and D Mavrikas for supporting us this week. Subscribe to SiriusXM Podcasts+ to listen to new episodes of StarTalk Radio ad-free and a whole week early.Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

Scientific Sense ® by Gill Eapen: Prof. Wendy Freedman is Professor of Astronomy and Astrophysics at the University of Chicago. Her current projects involve measurements of the Hubble constant -- the current expansion rate, as well as the past expansion rate, providing constraints on the acceleration of the universe and dark energyPlease subscribe to this channel:https://www.youtube.com/c/ScientificSense?sub_confirmation=1

Host | Matthew S WilliamsOn ITSPmagazine  

Host | Matthew S WilliamsOn ITSPmagazine  

MAKE HISTORY WITH US THIS SUMMER:https://demystifysci.com/demysticon-2025PATREON https://www.patreon.com/c/demystifysciPARADIGM DRIFThttps://demystifysci.com/paradigm-drift-showPATREON: get episodes early + join our weekly Patron Chat https://bit.ly/3lcAasBMERCH: Rock some DemystifySci gear : https://demystifysci.myspreadshop.com/allAMAZON: Do your shopping through this link: https://amzn.to/3YyoT98SUBSTACK: https://substack.com/@UCqV4_7i9h1_V7hY48eZZSLw@demystifysciDr. Indranil Banik is a physicist at the University of Portsmouth who studies λCDM cosmology, the standard model of physics that tells us the Big Bang happened, that it happened something like 13.8 billion years ago, and that the modern universe is replete with undetectable cold dark matter (the CDM of the theory). Listeners of the show will know that there are compelling reasons to believe that these conclusions are based on questionable assumptions at the very heart of physics. This conversation, between a liquid sun proponent, a scientist who has spent his career studying the mainstream, and an appreciator of finely crafted theories, is an opportunity to lay these questionable assumptions on the table and to see how they hold up to scrutiny. Dr. Banik is also an invited speaker at our Beyond the Big Bang gathering in Portugal this summer, and has graciously agreed to serve as a counterbalance to those who say that the Big Bang Theory doesn't have much life left in it. National Astronomy Meeting parallel session and a special issue in Galaxies, both about the Hubble tension:https://darkmattercrisis.wordpress.com/2025/02/12/100-hubble-tension-parallel-session-at-the-national-astronomy-meeting-2025-and-special-issue-in-galaxies/00:00 Go! 00:04:27 Stellar Age & Lower Boundary for Universe00:07:14 Data Analysis in Cosmology00:10:08 Data Calibration and Processing00:13:08 Gaia Mission and Data Management00:16:21 Parallax and Distance Measurement00:22:49 Parallax v. Cosmic Distance Estimates00:24:48 Cepheid Variables & Supernovae as Distance Placeholders00:39:24 Assumptions in Data Processing and Redshift00:46:03 Cosmic Redshift and Expansion00:48:33 Measuring the Universe's Age00:51:06 Hubble Constant and Tension00:54:04 CMB and Model Predictions00:56:00 Angular Scales and CMB Analysis01:00:18 Acoustic Oscillations in the CMB01:05:03 Intrinsic CMB Fluctuations01:07:48 CMB Power Spectrum Insights01:09:34 Cosmic Microwave Background (CMB) Standard Narrative01:13:47 Big Bang and Photon Origin01:18:18 Matter-Antimatter Annihilation and Implications01:22:00 CMB Contradicts Stars as Blackbodies01:30:02 LMH Structure and Phase States of Stars01:33:07 Tensions in Astrophysics Models01:38:25 Revisiting Scientific Assumptions01:46:52 Model Agreement and Constraints01:51:01 Modified Gravity Theories01:56:29 Dark Matter and Alternatives01:58:07 Gravitational Microlensing02:01:08 Galactic Cohesion Theories02:14:08 Hubble Tension Revisited02:19:41 Understanding Anomalies02:22:15 Reconsidering History#LiquidMetallicHydrogen, #astronomy, #cosmos, #stars, #astrophysics, #cosmology, #ElectricUniverse, #CosmicMicrowaveBackground, #UniverseOrigins, #philosophypodcast, #sciencepodcast, #longformpodcast AND our material science investigations of atomics, @MaterialAtomics https://www.youtube.com/@MaterialAtomicsJoin our mailing list https://bit.ly/3v3kz2S PODCAST INFO: Anastasia completed her PhD studying bioelectricity at Columbia University. When not talking to brilliant people or making movies, she spends her time painting, reading, and guiding backcountry excursions. Shilo also did his PhD at Columbia studying the elastic properties of molecular water. When he's not in the film studio, he's exploring sound in music. They are both freelance professors at various universities.

What were the coolest science and sci-fi events in the LIUniverse in 2024, and what's in store for us in 2025? To find out, Dr. Charles Liu and co-host Allen Liu welcome three members of our production team: Leslie Mullen, our Executive Producer making her first on air appearance, Jon Barnes, our Editor, and Stacey Severn, our Social Media/Patreon Community Director, both of whom are familiar to longtime fans. But first, as always, we start with the day's joyfully cool cosmic thing: the latest development in the dispute that astrophysicists call the “Hubble Tension.” Over the past 20 years, the two different methods of measuring the Hubble Constant, which is used to calculate the rate of universal expansion, have led to two different conclusions. Leslie points out that the universe isn't confused, we are, leading to a conversation about why accurate measurements matter in helping us expand our limited understanding. Then we begin our look back at the year in astronomy – or rather, our look up. Stacey takes us on a tour, from a Geminid meteor hitting the moon, to the spectacular aurora borealis visible in the Northeastern US, to Comet C/2023 A3 Tsuchinshan-ATLAS, to, of course, the Great North American Eclipse. The team share their viewing experiences while Chuck explains the impact of solar max on both the eclipse and the auroras. Next, Jon Barnes is back to talk about “The Three-Body Problem” science fiction series on Netflix. He asks Chuck to explain what we really know about cosmic particles (aka cosmic rays), because, in the series, the aliens use sophons, a supercomputer combined with a photon, to communicate across long distances at or near the speed of light. You'll also hear about the recent detection of a surprisingly large number of very high energy cosmic rays that are hitting us right now. Our fan question comes from Pshemo on Patreon and concerns an experiment to measure the dynamics of a local system relative to spacetime by using light as a way of gauging the background nature of the universe. And if you think that sounds pretty geeky, it's nothing compared to the conversation between Allen, Chuck and Leslie that ensues, encompassing Einstein, the Michelson–Morley experiment, gravitational waves, LIGO, Virgo, KAGRA, and LISA. There's plenty more in this episode, including a discussion of the recent wave of drone sightings, their similarity to the past UFO sightings, and the likelihood that they are all explained by less exotic causes than aliens. Moving on to the coolest “identified flying objects” of 2024, Leslie tells us about the Europa Clipper, which launched in October. It will reach orbit around Jupiter in 6 years in order to search for alien life in the subsurface oceans of its icy moon Europa. Chuck reminds us all that NASA's Parker Solar Probe will make its closest approach to our Sun on Christmas Eve 2024. Finally, it's time for the team to share what they're looking forward to in 2025. Jon is psyched for “Mickey 17,” a film by director Bong Joon-ho about a clone on a space colony. Allen is excited for Rocket Lab's Venus Life Finder, the first private interplanetary space probe, which launches in January to search for organic compounds within Venus' atmosphere. Stacey is looking forward to Axiom Space's fourth mission to the ISS in 2025, an international trip to conduct scientific experiments commanded again by Peggy Whitson. Leslie is most excited for the discovery nobody is expecting, whatever that may be. And what is Chuck looking forward to most in 2025? The long-awaited start of scientific operations at the Vera Rubin Observatory, which will take a full picture of the sky every 30 seconds for ten years and deliver an unprecedented level of data for astronomers to feast upon! We hope you enjoy this episode of The LIUniverse, and, if you do, please support us on Patreon.   Credits for Images Used in this Episode: Illustration of the Hubble constant – NASA/ESA/StSci, Public Domain Gianluca Lombardi Geminid meteor shower video podcast – ESO, Public Domain Northern Lights over the Northeastern US in 2024. – Elliot Severn, All Rights Reserved Northern Lights over the Northeastern US in 2024. – Allen Liu, All Rights Reserved Comet C/2023 A3 Tsuchinshan-ATLAS – Elliot Severn, All Rights Reserved Map showing total solar eclipse viewing in US in 2017 and 2024. – Ernest Wright/NASA's Scientific Visualization Studio, Public Domain Total solar eclipse, April 8, 2024. – Elliot Severn, All Rights Reserved How LIGO achieves steadiness – Caltech/MIT/LIGO Lab, Public Domain Europa Clipper construction – NASA/JPL, Public Domain Artist rendering of Europa Clipper traveling to Jupiter – NASA/JPL, Public Domain Artist concept of the Casini spacecraft flying through the water/ice plumes of Enceladus – NASA/JPL, Public Domain Artist concept of NASA's Parker Solar Probe flying close to the Sun. – NASA, Public Domain

How old is the universe—and how fast is it expanding? These are part of one of the biggest—and most contested—questions in science, and the answers could change our understanding of physics.In this episode, we talk with renowned UChicago astronomer Wendy Freedman, who's spent decades trying to solve these very questions. There are two ways to measure how fast the universe is expanding, also known as the Hubble constant; Freedman has done groundbreaking research to calculate this number using stars, but the problem is, her numbers don't match up with scientists using a different method. And the implications of that difference are massive, because it could indicate that our Standard Model of physics could be broken.Yet Freedman's latest research, using the powerful James Webb Space Telescope, might finally give us a clearer answer. In our conversation, we explore the age of the universe, the mysteries of dark matter and what all this could mean for the future of physics—and maybe even the discovery of life beyond Earth.

Wendy Freedman, the former director of the Carnegie Observatories and now distinguished professor at University of Chicago, has been a leading figure in observational cosmology and astronomy for over 30 years. I have known her as a friend and colleague, and have learned much from her over the years, and was very excited to be able to snag her amidst her busy schedule to record a podcast a week or two before the release of a new blockbuster result her team had produced. I am very happy that Critical Mass listeners will be among the first to get the detailed lowdown on the likely resolution of a problem that has been plaguing cosmology for the past decade. In the 1990's Wendy led a major international team of astronomers in carrying the Hubble Space Telescope Key Project. The Hubble Space Telescope (HST) was named in part because of this project, to establish the distance scale of the universe and measure its current expansion rate, a quantity not coincidentally called the Hubble Constant, first measured by Edwin Hubble in 1929. Since that time, different groups have measured this most important single observable in our universe and gotten widely different values. In the 1980's and early 90's two different groups got values that differed by a factor of 2, even though each claimed errors of less than 10%. In 2001, Freedman's team published their result, truly accurate to 10%, and the value, perhaps not surprisingly, fell right in the middle between the previous two discrepant values. All was good, until inferences based on the Cosmic Microwave Background, the most precise observable in modern cosmology suggested that measurements at a time when the universe was 300,000 years old, when extrapolated forward using the best current theory of cosmology today, would give a value that different from the HST value. The difference was statistically significant, and as time proceeded, and error bars got smaller, the discrepancy between the HST (and then the James Web Space Telescope (JWST)) measurement, and the CMB measurement got more significant. Was our current model of cosmology simply wrong?Such was the claim in various places over the past few years. Most recently, Wendy led a team to measure cosmic distances in 3 different ways using JWST, and as she describes in our discussion, it looks like the problem may now be solved, although not without leaving other mysteries.We talked about a lot more than this though. Wendy's background, what got her into astronomy, her experiences throughout her career, and her leadership in a new project building the Giant Magellan Telescope, what will be the largest telescope in the world in Chile. The discussion was as fun as it was exciting. Wendy is a wonderful popular expositor, and as always, I really enjoyed talking to her. Tune in to hear, for the first time, about the newest and most important recent result in cosmology from one of my favorite colleagues and a world class scientist.As always, an ad-free video version of this podcast is also available to paid Critical Mass subscribers. Your subscriptions support the non-profit Origins Project Foundation, which produces the podcast. The audio version is available free on the Critical Mass site and on all podcast sites, and the video version will also be available on the Origins Project YouTube. Get full access to Critical Mass at lawrencekrauss.substack.com/subscribe

Join Hugh Ross in this breaking News of the Day episode of Stars, Cells, and God. Hugh describes how the latest measurements of cosmic baryon acoustic oscillations shed light on the true nature of dark energy and may resolve the tension between measurements of the cosmic expansion rate (Hubble constant) based on nearby galaxies with measurements based on the cosmic microwave background radiation and extremely distant galaxies.  Some of the Hubble constant tension is resolved by the fact that our galaxy resides in an under-dense part of the universe. The remaining tension can be resolved if 1) the curvature of the universe slightly departs from a flat geometry; 2) the dark energy equation of state slightly varies as the universe ages; and/or 3) systematic errors in expansion rate measurements based on Cepheid variable stars are greater than they are for tip of the red giant branch stars. The Dark Energy Survey Collaboration (DESC) analyzed 1,829 type Ia supernovae with distances spanning 0.14–10.92 billion light years calibrated by the most extensive survey of baryon acoustic oscillations. The DESC found that systematic errors in Cepheid variable star measures play a significant factor in the Hubble constant tension. The DESC showed that the latest survey of baryon acoustic oscillations revealed a slight variation in the dark energy equation of state. The Euclid telescope soon will map baryon acoustic oscillations to a far greater extent, which will provide a definitive resolution of the Hubble constant tension. Links and Resources: The Dark Energy Survey Supernova Program: An Updated Measurement of the Hubble Constant Using the Inverse Distance Ladder The Dark Energy Survey Supernova Program: Investigating Beyond-LCDM Resolving Hubble Constant and Creation Tension

We continue our discussion about the Hubble Constant and delve into a few other cosmic anomalies, including the assumption Albert Einstein made regarding the speed of light. And, somehow, we also ended up talking about Noah's flood and the Whopper Sand. You'll have to listen to the end to find out how that happened! Come and see how we think it all points to the glory and majesty of God. Dan's very short video on the whooper sand.   https://www.youtube.com/watch?v=7r9COYBra94   The following links are not meant to imply the ideas contained therein reflect those of Good Heavens! or Watchman Fellowship, Inc. All of these, with the exception of Danny Faulkner, are presented from a completely secular perspective of the universe Veritasium Video on the one-way speed of light problem. https://www.youtube.com/watch?v=pTn6Ewhb27k More in-depth on the Hubble Constant - Interview with Christian astronomer Dr. Danny Faulkner on the Hubble Constant. https://www.youtube.com/watch?v=zqUkhyxCbPE Cosmological constant (not the same as the Hubble constant, but related).  https://wmap.gsfc.nasa.gov/universe/uni_accel.html Hubble constant - two different ways to measure (from 2020).  https://www.scientificamerican.com/article/how-a-dispute-over-a-single-number-became-a-cosmological-crisis/ Three ways to measure Hubble constant.  https://news.uchicago.edu/explainer/hubble-constant-explained  Brian Keating short video about using magnetism to measure the Hubble constant  https://youtu.be/kBdtvURyJ8Q?si=-wlE-9D1emA-NP1- Dr. Becky most recent video on the crisis.  https://www.youtube.com/watch?v=yKmPJmaeP8A Adam Riese from the Space Telescope Science Institute who won the Nobel Prize in the late 90s for discovering the universe expansion was (allegedly) accelerating. His SH0ES team measured the Hubble constant at 74 km/s/mpsc, far above Wendy Freedman's 69.8 and the CMBR at 67.  https://www.youtube.com/watch?v=JmDszPExepc   Scientific American article on the HC from October 2023.  https://www.scientificamerican.com/article/a-possible-crisis-in-the-cosmos-could-lead-to-a-new-understanding-of-the-universe/   Wendy Freedman's initial project of measuring HC using the HST to measure Cepheids.  https://www.stsci.edu/stsci/meetings/shst2/freedmanw.html Historical background on the HC from STScI. (2020)  https://www.stsci.edu/contents/newsletters/2020-volume-37-issue-02/hubble-and-the-constant-the-next-and-the-next-generation Good Heavens! Is a production of Watchman Fellowship, Inc. For more information on our ministry and our sister podcast Apologetics Profile, visit Watchman.org today! Contact Wayne and Dan at  Psalm1968@gmail.com    Podbean enables our podcast to be on Apple Podcasts and other major podcast platforms.  To support Good Heavens! on Podbean as a patron, you can use the Podbean app, or go to https://patron.podbean.com/goodheavens.  This goes to Wayne Spencer. If you would like to give to the ministry of Watchman Fellowship or to Daniel Ray, you can donate at https://www.watchman.org/daniel. Donations to Watchman are tax deductible.

Probably the only thing that is constant about the Hubble Constant is that it keeps changing! What is it? Why is it such a hot topic in cosmology today and why are some even calling it a "crisis"? Come along with Wayne and Dan as they dive into the quest for the elusive magic number. What does it mean for cosmology and what might it all have to do with the way God made the universe? The following links are not meant to imply the ideas contained therein reflect those of Good Heavens! or Watchman Fellowship, Inc. All of these, with the exception of Danny Faulkner, are presented from a completely secular perspective of the universe More in-depth on the Hubble Constant - Interview with Christian astronomer Dr. Danny Faulkner on the Hubble Constant. https://www.youtube.com/watch?v=zqUkhyxCbPE Cosmological constant (not the same as the Hubble constant, but related).  https://wmap.gsfc.nasa.gov/universe/uni_accel.html Hubble constant - two different ways to measure.  https://www.scientificamerican.com/article/how-a-dispute-over-a-single-number-became-a-cosmological-crisis/ Three ways to measure Hubble constant. https://news.uchicago.edu/explainer/hubble-constant-explained  Brian Keating short video about using magnetism to measure the Hubble constant  https://youtu.be/kBdtvURyJ8Q?si=-wlE-9D1emA-NP1- Dr. Becky most recent video on the crisis. https://youtu.be/yKmPJmaeP8A?si=Wf6ajm4qGuC5CZX6 Adam Riese from the Space Telescope Science Institute who won the Nobel Prize in the late 90s for discovering the universe expansion was (allegedly) accelerating. His SH0ES team measured the Hubble constant at 74 km/s/mpsc, far above Wendy Freedman's 69.8 and the CMBR at 67. https://youtu.be/JmDszPExepc?si=03HqPi3RU5uRkSSl Technical  power point slides from Dr. Jo Dunkley on the PLANK CMBR data on the Hubble constant.  https://online.kitp.ucsb.edu/online/primocosmo13/dunkley/pdf/Dunkley_PrimoCosmo13_KITP.pdf Scientific American article on the HC from October 2023.  https://www.scientificamerican.com/article/a-possible-crisis-in-the-cosmos-could-lead-to-a-new-understanding-of-the-universe/ Wendy Freedman's initial project of measuring HC using the HST to measure Cepheids.  https://www.stsci.edu/stsci/meetings/shst2/freedmanw.html Historical background on the HC from STScI. (2020)  https://www.stsci.edu/contents/newsletters/2020-volume-37-issue-02/hubble-and-the-constant-the-next-and-the-next-generation Good Heavens! Is a production of Watchman Fellowship, Inc. For more information on our ministry and our sister podcast Apologetics Profile, visit Watchman.org today! Contact Wayne and Dan!    Psalm1968@gmail.com    Podbean enables our podcast to be on Apple Podcasts and other major podcast platforms.  To support Good Heavens! on Podbean as a patron, you can use the Podbean app, or go to https://patron.podbean.com/goodheavens.  This goes to Wayne Spencer. If you would like to give to the ministry of Watchman Fellowship or to Daniel Ray, you can donate at https://www.watchman.org/daniel. Donations to Watchman are tax deductible.

Host | Matthew S WilliamsOn ITSPmagazine  

Host | Matthew S WilliamsOn ITSPmagazine  

The so-called Crisis in Cosmology didn't go anywhere. Different methods are giving different values for the Hubble Constant creating one of the most interesting mysteries in Astronomy. What possible solutions do we have? Discussing them with Dr Sunny Vagnozzi.

The so-called Crisis in Cosmology didn't go anywhere. Different methods are giving different values for the Hubble Constant creating one of the most interesting mysteries in Astronomy. What possible solutions do we have? Discussing them with Dr Sunny Vagnozzi.

On The Space Show for Wednesday, 20 September 2023: Is there life on exoplanet Kepler K2-18b? Nikku Madhusudhan of the Institute of Astronomy at Cambridge University, reports the discovery of methane, carbon dioxide and the possible detection of the biomarker dimethyl sulphide on an exoplanet, using the James Webb Space Telescope. (Audio insert courtesy STScI) OSIRIS-REx — Journey's End: A summary of the OSIRIS-REx mission to collect a sample of asteroid Bennu, and plans for Sunday's landing in Utah. (Audio insert courtesy GSFC) Hubble Tension: The age of the Universe is estimated by two main methods: Locally (Parallax-Cepheids-Supernovae-Redshift) and Cosmic Microwave Background (COBE, Planck). The problem is they give two different measures for the Hubble Constant, and hence the age of the Universe. This feature looks back on COBE, and has a talk by Nobel Prize winner Adam Riess on his use of the James Webb Space Telescope to refine the measure of the Hubble Constant. (Audio inserts courtesy NASA, STScI) Trolls, UAPs and NASA: The internet trolls made NASA initially suppress the name of the director of Unidentified Anomalous Phenomena research. (Audio insert courtesy NASA)

Join Hugh Ross and Jeff Zweerink as they discuss new discoveries taking place at the frontiers of science, discoveries that have theological and philosophical implications, including the reality of God's existence.   AI-Human Collaboration Artificial intelligence (AI) can analyze enormous diverse databases at lightning speeds. But unlike humans, AI can't reason, produce new databases, or make sense of things it hasn't seen before. Only humans can determine what's interesting and worth pursuing and what isn't. Recognizing these distinctives, a team at Lam Research Corporation conducted experiments to determine how best to manage collaboration between AI and humans to optimize the development of computer chips with target characteristics. The Lam team found that AI works best when human experts operate as “data dieticians,” controlling the amounts, kinds, and timing of data being fed into AI systems.  References: Human-Machine Collaboration for Improving Semiconductor Process Development   New Hubble Constant Measurement The strongest evidence supporting big bang models comes from measurements of the universe's expansion. Although scientists have compelling evidence for expansion from Cepheid variables and Type 1a supernovae, as well as the cosmic microwave background radiation, astronomers continue to search for data that will confirm or falsify current understanding. Recently, scientists applied a new technique to measure the Hubble constant (which is a simple way to quantify the universe's expansion) and found results consistent with the best measurements from other techniques. These results add to the already substantial evidence that we live in a big bang universe. References: Gravitationally Lensed Supernova Yields Novel Hubble Constant Result

Watch the full video on youtube here: https://youtu.be/b3Tx1g8gKmY Other Episode with Adam Riess: https://youtu.be/WZUqzHRuzhA Adam Riess is a renowned astrophysicist recognized for his groundbreaking research on the expansion of the universe with the 2011 Nobel Prize in physics Through extensive measurements and collaborations with other scientists, Riess discovered an intriguing tension in the size of the universe's expansion, which has steadily grown over the past decade. These results, reaching a significant level of more than 5 sigma, revealed an unexpected phenomenon: the rate of the universe's expansion seems to differ based on whether one starts from the beginning shortly after the big bang or from the present. This unexpected autonomy in the expansion challenged the traditional cosmological model, which tells the story of the universe's evolution from its inception to its current state. Riess's research has generated suspicion among many scientists, leading them to question whether the cosmological model itself needs revision. In his pursuit of unraveling the mysteries of the universe, Riess reminds us that advanced technology may often be mistaken for something magical. On this episode of INTO THE IMPOSSIBLE Riess explores the challenges of measuring distances in the universe and the discrepancies between measurements of the expansion rate of the universe first observed by Edwin Hubble namesake of The Hubble Constant, a pillar of cosmology. From the use of parallax (dating back to ancient Greece) to the use of Cepheid variables and Type 1a supernovae, Riess takes listeners on a journey through the cosmic distance ladder and the problem of the variation in the measurement of the Hubble constant known as the Hubble Tension. The possible role of dark energy is discussed, opening up new avenues for scientific investigation. Riess shares insights into the concept of the cosmological principle, and how it is challenged by the Hubble Tension. The conversation touches on peak experiences, the awe-inspiring encounters with nature that trigger moments of gratitude and curiosity, and the importance of sustaining these feelings in scientific exploration. Riess highlights the empirical nature of observational cosmology and the need for continued data collection and refining of models. Black holes, gravitational lensing, and Adam's motivations to pursue precision science are discussed. Subscribe to the Jordan Harbinger Show for amazing content from Apple's best podcast of 2018! https://www.jordanharbinger.com/podcasts  Please leave a rating and review: On Apple devices, click here, https://apple.co/39UaHlB On Spotify it's here: https://spoti.fi/3vpfXok On Audible it's here https://tinyurl.com/wtpvej9v  Find other ways to rate here: https://briankeating.com/podcast Support the podcast on Patreon https://www.patreon.com/drbriankeating  or become a Member on YouTube- https://www.youtube.com/channel/UCmXH_moPhfkqCk6S3b9RWuw/join Learn more about your ad choices. Visit megaphone.fm/adchoices

Today's Space, Astronomy, and Science News Podcast Astronomy Daily the Podcast - Episode May 15, 2023 European spacecraft, Jupiter IC moons explorer (JUICE), successfully freed a 16-meter radar antenna, which had been jammed for a month, and will use it to investigate Jupiter's moons Callisto, Europa, and Ganymede. NASA's Lunar Flashlight mission, which aimed to hunt for ice in the lunar south pole, failed to reach its intended orbit and is now orbiting the sun. Russian cosmonauts successfully completed a five-hour and 14-minute spacewalk outside the International Space Station to activate a radiator and conduct other maintenance activities. Astronomers have captured images of a star named ZTF SLRN 2020 consuming one of its planets, causing the star to brighten 100 times its normal level. This confirmed the long-standing assumption that stars swallow their planets, and the process has been illuminated. Steve Dunkley and digital assistant Hallie also briefly discuss the Hollywood movie Red Planet and its portrayal of space janitors. Steve returns after recovering from COVID-19. Astronomy Daily – The Podcast is available on Apple Podcasts, Spotify, YouTube and wherever you get your podcasts. Apple Podcasts: https://podcasts.apple.com/us/podcast/astronomy-daily-the-podcast/id1642258990 Spotify: https://open.spotify.com/show/2kPF1ABBW2rCrjDlU2CWLW Or stream from our websites at www.spacenuts.io or our HQ at www.bitesz.com Astronomy Daily The Podcast now has its own YouTube channel – please subscribe (we're a little lonely there) – thank you: www.youtube.com/@astronomydailythepodcast Commercial Free Premium version available with a Space Nuts subscription via Supercast only. Details: https://spacenuts.supercast.com/ Please subscribe to the podcast and if you have a moment, a quick review would be most helpful. Thank you… Please show our sponsor some love. Looking to buy a domain name and establish yourself online for not very much money? Then use the folks we trust all our domains too… NameCheap…and help support the show. To find out more visit www.spacenutspodcast.com/namecheap - thank you. #space #astronomy #science #podcast #astronomydaily #spacenuts #spacetime

In this episode, Jud explains dark matter, its mysterious gravitational force, and how we know it exists while AJ discusses dark energy and the idea that perhaps empty space isn't....empty. By the end of this episode you'll want to hug -- or slap -- the nearest theoretical physicist.Additional topics include: a Newtonian physics crash course, the Hubble Constant, and the Big Rip

What do the early galaxies discovered by JWST tell us about the early universe? Neil deGrasse Tyson and comedian Matt Kirshen explore the expansion of space, dark energy, and the age of the universe with astronomer, Wendy Freedman.NOTE: StarTalk+ Patrons can listen to this entire episode commercial-free.Thanks to our Patrons Fernando Colón, Richie Mercado, Miami John, David Rivera, Matthew Reason, and Kostas Chaskis for supporting us this week.Photo Credit: NASA, ESA, CSA, I. LABBE

All links: mctoon.net

What if the laws of physics were different? Neil deGrasse Tyson and co-hosts Chuck Nice and Gary O'Reilly answer grab bag questions with astrophysicist Charles Liu about alien heists, gravity, and space exploration.NOTE: StarTalk+ Patrons can listen to this entire episode commercial-free here: https://startalkmedia.com/show/cosmic-queries-alien-heist-scimitars-time-in-a-bottle-with-charles-liu/Photo Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)-ESA/Hubble Collaboration, Public domain, via Wikimedia Commons

Get Exclusive Episode Of Space Infinite Podcast - https://forms.gle/rnpoMif7SRLs39MR8 #50. The Hubble Constant in Hindi What is the Hubble Constant and mystery related to the expansion of the Universe? - Learn about it in this episode of the space infinite podcast! Connect on Instagram - @itssmbh - https://www.instagram.com/itssmbh/

The Hubble Constant Troubled by Dark Matter in Non-Standard Cosmologies by Jailson S. Alcaniz et al. on Tuesday 29 November The Standard Cosmological Model has experienced tremendous success at reproducing observational data by assuming a universe dominated by a cosmological constant and dark matter in a flat geometry. However, several studies, based on local measurements, indicate that the universe is expanding too fast, in disagreement with the Cosmic Microwave Background. Taking into account combined data from CMB, Baryon Acoustic Oscillation, and type Ia Supernovae, we show that if the mechanism behind the production of dark matter particles has at least a small non-thermal origin, one can induce larger values of the Hubble rate $H_0$, within the $Lambda$CDM, to alleviate the trouble with $H_0$. In the presence of non-standard cosmology, however, we can fully reconcile CMB and local measurements and reach $H_0=70-74, {rm km s^{-1} Mpc^{-1}}$. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.14345v1

The Hubble Constant Troubled by Dark Matter in Non-Standard Cosmologies by Jailson S. Alcaniz et al. on Monday 28 November The Standard Cosmological Model has experienced tremendous success at reproducing observational data by assuming a universe dominated by a cosmological constant and dark matter in a flat geometry. However, several studies, based on local measurements, indicate that the universe is expanding too fast, in disagreement with the Cosmic Microwave Background. Taking into account combined data from CMB, Baryon Acoustic Oscillation, and type Ia Supernovae, we show that if the mechanism behind the production of dark matter particles has at least a small non-thermal origin, one can induce larger values of the Hubble rate $H_0$, within the $Lambda$CDM, to alleviate the trouble with $H_0$. In the presence of non-standard cosmology, however, we can fully reconcile CMB and local measurements and reach $H_0=70-74, {rm km s^{-1} Mpc^{-1}}$. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2211.14345v1

Moving gravitational wave sources at cosmological distances: Impact on the measurement of the Hubble constant by Alejandro Torres-Orjuela et al. on Tuesday 18 October Standard sirens -- gravitational wave (GW) sources with an electromagnetic (EM) counterpart -- can be used to measure the Hubble constant directly which should help to ease the existing Hubble tension. However, if the source is moving, a relativistic redshift affects the redshift of the EM counterpart and the apparent distance of the GW source, and thus it needs to be corrected to obtain accurate measurements. We study the effect of velocity on GWs for a source in an expanding universe showing that the total redshift of the wave is equal to the product of the relativistic redshift and the cosmological redshift. We, further, find that a motion of the source changes its apparent distance by a factor $(1+z_{rm rel})^2$ in contrast to a linear factor for the cosmological redshift. We discuss that the additional factor for the relativistic redshift is a consequence of a velocity-dependent amplitude for GWs. We consider the effect of the velocity on the chirp mass and the apparent distance of the source an observer would infer when ignoring the velocity. We find that for different astrophysical scenarios the error in the chirp mass can range between 0.1,% and 7,% while the error in the apparent distance can be between 0.25,% and 15,%. Furthermore, we consider the error introduced in the measurement of the Hubble constant using standard sirens for two cases: (i) when the effect of velocity on the redshift of the EM counterpart is considered but not on the apparent distance obtained from GWs and (ii) when the effect of the velocity is ignored completely. We find that in the first case the error can reach 1,% for a source moving due to the peculiar velocity of its host galaxy and that in the second case the error can be more than 5,% for a source at the distance of GW150914 with the same velocity. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.09737v1

A crack in the track of the Hubble Constant by Marie Gueguen. on Tuesday 18 October Measuring the rate at which the universe expands at a given time -- the 'Hubble constant' -- has been a topic of controversy since the first measure of its expansion by Edwin Hubble in the 1920's. As early as the 1970's, Sandage et de Vaucouleurs have been arguing about the adequate methodology for such a measurement. Should astronomers focus only on their best indicators, e.g., the Cepheids, and improve the precision of this measurement based on a unique object to the best possible? Or should they 'spread the risks', i.e., multiply the indicators and methodologies before averaging over their results? Is a robust agreement across several uncertain measures, as is currently argued to defend the existence of a 'Hubble crisis' more telling than a single one percent precision measurement? This controversy, I argue, stems from a misconception of what managing the uncertainties associated with such experimental measurements require. Astrophysical measurements, such as the measure of the Hubble constant, require a methodology that permits both to reduce the known uncertainties and to track the unknown unknowns. Based on the lessons drawn from the so-called Hubble crisis, I sketch a methodological guide for identifying, quantifying and reducing uncertainties in astrophysical measurements, hoping that such a guide can not only help to re-frame the current Hubble tension, but serve as a starting point for future fruitful discussions between astrophysicists, astronomers and philosophers. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2210.09661v1

Measuring the Hubble Constant with Double Gravitational Wave Sources in Pulsar Timing by Casey McGrath et al. on Wednesday 12 October Pulsar timing arrays (PTAs) are searching for gravitational waves from supermassive black hole binaries (SMBHBs). Here we show how future PTAs could use a detection of gravitational waves from individually resolved SMBHB sources to produce a purely gravitational wave-based measurement of the Hubble constant. This is achieved by measuring two separate distances to the same source from the gravitational wave signal in the timing residual: the luminosity distance $D_L$ through frequency evolution effects, and the parallax distance $D_mathrm{par}$ through wavefront curvature (Fresnel) effects. We present a generalized timing residual model including these effects in an expanding universe. Of these two distances, $D_mathrm{par}$ is challenging to measure due to the pulsar distance wrapping problem, a degeneracy in the Earth-pulsar distance and gravitational wave source parameters that requires highly precise, sub-parsec level, pulsar distance measurements to overcome. However, in this paper we demonstrate that combining the knowledge of two SMBHB sources in the timing residual largely removes the wrapping cycle degeneracy. Two sources simultaneously calibrate the PTA by identifying the distances to the pulsars, which is useful in its own right, and allow recovery of the source luminosity and parallax distances which results in a measurement of the Hubble constant. We find that, with optimistic PTAs in the era of the Square Kilometer Array, two SMBHB sources within a few hundred Mpc could be used to measure the Hubble constant with a relative uncertainty on the order of 10 per cent. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2208.06495v2

Cosmological-model-independent determination of Hubble constant from fast radio bursts and Hubble parameter measurements by Yang Liu et al. on Tuesday 11 October We establish a new cosmological-model-independent method to determine the Hubble constant $H_0$ from the localized FRBs and the Hubble parameter measurements and obtain a first such determination $H_0=70.60pm2.11~mathrm{km/s/Mpc}$ of about 3.00% uncertainty with data from the eighteen localized FRBs and nineteen Hubble parameter measurements in the redshift range $0

SN 2021hpr and its two siblings in the Cepheid calibrator galaxy NGC 3147: A hierarchical BayeSN analysis of a Type Ia supernova trio, and a Hubble constant constraint by Sam M. Ward et al. on Thursday 22 September To improve Type Ia supernova (SN Ia) standardisability, the consistency of distance estimates to siblings -- SNe in the same host galaxy -- should be investigated. We present Young Supernova Experiment Pan-STARRS-1 $grizy$ photometry of SN 2021hpr, the third spectroscopically confirmed SN Ia in the high-stellar-mass Cepheid-calibrator galaxy NGC 3147. We analyse NGC 3147's trio of SN Ia siblings: SNe 1997bq, 2008fv and 2021hpr, using a new version of the BayeSN model of SN Ia spectral-energy distributions, retrained simultaneously using optical-NIR $BgVrizYJH$ (0.35--1.8 $mu$m) data. The distance estimates to each sibling are consistent, with a sample standard deviation $lesssim$0.01 mag, much smaller than the total intrinsic scatter in the training sample: $sigma_0approx0.09$ mag. Fitting normal SN Ia siblings in three additional galaxies, we estimate a $approx$90% probability that the siblings' intrinsic scatter is smaller than $sigma_0$. We build a new hierarchical model that fits light curves of siblings in a single galaxy simultaneously; this yields more precise estimates of the common distance and the dust parameters. Fitting the trio for a common dust law shape yields $R_V=2.69pm0.52$. Our work motivates future hierarchical modelling of more siblings, to tightly constrain their intrinsic scatter, and better understand SN-host correlations. Finally, we estimate the Hubble constant, using a Cepheid distance to NGC 3147, the siblings trio, and 109 Hubble flow ($0.01 < z_{rm{CMB}} < 0.08$) SNe Ia; marginalising over the siblings' and population's intrinsic scatters, and the peculiar velocity dispersion, yields $H_0=77.9pm6.5 text{ km s}^{-1}text{Mpc}^{-1}$. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.10558v1

Machine Learning the Hubble Constant by Carlos Bengaly et al. on Monday 19 September Local measurements of the Hubble constant ($H_0$) based on Cepheids e Type Ia supernova differ by $approx 5 sigma$ from the estimated value of $H_0$ from Planck CMB observations under $Lambda$CDM assumptions. In order to better understand this $H_0$ tension, the comparison of different methods of analysis will be fundamental to interpret the data sets provided by the next generation of surveys. In this paper, we deploy machine learning algorithms to measure the $H_0$ through a regression analysis on synthetic data of the expansion rate assuming different values of redshift and different levels of uncertainty. We compare the performance of different algorithms as Extra-Trees, Artificial Neural Network, Extreme Gradient Boosting, Support Vector Machines, and we find that the Support Vector Machine exhibits the best performance in terms of bias-variance tradeoff, showing itself a competitive cross-check to non-supervised regression methods such as Gaussian Processes. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.09017v1

Determining the Hubble Constant without the Sound Horizon: A 3 6 % Constraint on H 0 from Galaxy Surveys, CMB Lensing and Supernovae by Oliver H. E. Philcox et al. on Wednesday 14 September Many theoretical resolutions to the so-called "Hubble tension" rely on modifying the sound horizon at recombination, $r_s$, and thus the acoustic scale used as a standard ruler in the cosmic microwave background (CMB) and large scale structure (LSS) datasets. As shown in a number of recent works, these observables can also be used to compute $r_s$-independent constraints on $H_0$ by making use of the horizon scale at matter-radiation equality, $k_{rm eq}$, which has different sensitivity to high redshift physics than $r_s$. As such, $r_s$- and $k_{rm eq}$-based measurements of $H_0$ (within a $Lambda$CDM framework) may differ if there is new physics present pre-recombination. In this work, we present the tightest constraints on the latter from current data, finding $H_0=64.8^{+2.2}_{-2.5}$ at 68% CL (in $mathrm{km},mathrm{s}^{-1}mathrm{Mpc}^{-1}$ units) from a combination of BOSS galaxy power spectra, Planck CMB lensing, and the newly released Pantheon+ supernova constraints, as well as physical priors on the baryon density, neutrino mass, and spectral index. The BOSS and Planck measurements have different degeneracy directions, leading to the improved combined constraints, with a bound of $H_0 = 67.1^{+2.5}_{-2.9}$ ($63.6^{+2.9}_{-3.6}$) from BOSS (Planck) alone. The results show some dependence on the neutrino mass bounds, with the constraint broadening to $H_0 = 68.0^{+2.9}_{-3.2}$ if we instead impose a weak prior on $sum m_nu$ from terrestrial experiments, or shifting to $H_0 = 64.6pm2.4$ if the neutrino mass is fixed to its minimal value. Even without dependence on the sound horizon, our results are in $approx 3sigma$ tension with those obtained from the Cepheid-calibrated distance ladder, which begins to cause problems for new physics models that vary $H_0$ by changing acoustic physics or the expansion history immediately prior to recombination. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2204.02984v4

Constraining the Hubble constant and its lower limit from the proper motion of extragalactic radio jets by Tiger Yu-Yang Hsiao et al. on Monday 12 September The Hubble constant ($H_{0}$) is a measurement to describe the expansion rate of the Universe in the current era. However, there is a $4.4sigma$ discrepancy between the measurements from the early Universe and the late Universe. In this research, we propose a model-free and distance-free method to constrain $H_{0}$. Combining Friedman-Lema^itre-Robertson-Walker cosmology with geometrical relation of the proper motion of extragalactic jets, the lower limit ($H_{rm 0,min}$) of $H_{0}$ can be determined using only three cosmology-free observables: the redshifts of the host galaxies, as well as the approaching and receding angular velocities of radio jets. Using these, we propose to use the Kolmogorov-Smirnov test (K-S test) between cumulative distribution functions of $H_{rm 0,min}$ to differentiate cosmology. We simulate 100, 200, and 500 extragalactic jets with 3 levels of accuracy of the proper motion ($mu_{a}$ and $mu_{r}$), at $10%$, $5%$, and $1%$, corresponding to the accuracies of the current and future radio interferometers. We perform K-S tests between the simulated samples as theoretical distributions with different $H_{0}$ and power-law index of velocity distribution of jets and mock observational data. Our result suggests increasing sample sizes leads to tighter constraints on both power-law index and the Hubble constant at moderate accuracy (i.e., $10%$ and $5%$) while at $1%$ accuracy, increasing sample sizes leads to tighter constraints on power-law index more. Improving accuracy results in better constraints in the Hubble constant compared with the power-law index in all cases but it alleviates the degeneracy. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.05008v1

An updated measurement of the Hubble constant from near-infrared observations of Type Ia supernovae by Lluís Galbany et al. on Wednesday 07 September We present a measurement of the Hubble constant ($H_0$) using type Ia supernova (SNe Ia) in the near-infrared (NIR) from the recently updated sample of SNe Ia in nearby galaxies with distances measured via Cepheid period-luminosity relations by the SHOES project. We collect public near-infrared photometry of up to 19 calibrator SNe Ia and further 57 SNe Ia in the Hubble flow ($z>0.01$), and directly measure their peak magnitudes in the $J$ and $H$ band by Gaussian processes and spline interpolation. Calibrator peak magnitudes together with Cepheid-based distances are used to estimate the average absolute magnitude in each band, while Hubble-flow SNe are used to constrain the zero-point intercept of the magnitude-redshift relation. Our baseline result of $H_0$ is $72.3pm1.4$ (stat) $pm1.4$ (syst) km s$^{-1}$ Mpc$^{-1}$ in the $J$ band and $72.3pm1.3$ (stat) $pm1.4$ (syst) km s$^{-1}$ Mpc$^{-1}$ in the $H$ band, where the systematic uncertainties include the standard deviation of up to 21 variations of the analysis, the 0.7% distance scale systematic from SHOES Cepheid anchors, a photometric zeropoint systematic, and a cosmic variance systematic. Our final measurement represents a measurement with a precision of 2.8% in both bands. The variant with the largest change in $H_0$ is when limiting the sample to SNe from CSP and CfA programmes, noteworthy because these are the best calibrated, yielding $H_0sim75$ km s$^{-1}$ Mpc$^{-1}$ in both bands. We demonstrate stretch and reddening corrections are still useful in the NIR to standardize SN Ia NIR peak magnitudes. Based on our results, in order to improve the precision of the $H_0$ measurement with SNe Ia in the NIR in the future, we would need to increase the number of calibrator SNe Ia, be able to extend the Hubble-Lema^itre diagram to higher-z, and include standardization procedures to help reducing the NIR intrinsic scatter. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.02546v1

An updated measurement of the Hubble constant from near-infrared observations of Type Ia supernovae by Lluís Galbany et al. on Wednesday 07 September We present a measurement of the Hubble constant ($H_0$) using type Ia supernova (SNe Ia) in the near-infrared (NIR) from the recently updated sample of SNe Ia in nearby galaxies with distances measured via Cepheid period-luminosity relations by the SHOES project. We collect public near-infrared photometry of up to 19 calibrator SNe Ia and further 57 SNe Ia in the Hubble flow ($z>0.01$), and directly measure their peak magnitudes in the $J$ and $H$ band by Gaussian processes and spline interpolation. Calibrator peak magnitudes together with Cepheid-based distances are used to estimate the average absolute magnitude in each band, while Hubble-flow SNe are used to constrain the zero-point intercept of the magnitude-redshift relation. Our baseline result of $H_0$ is $72.3pm1.4$ (stat) $pm1.4$ (syst) km s$^{-1}$ Mpc$^{-1}$ in the $J$ band and $72.3pm1.3$ (stat) $pm1.4$ (syst) km s$^{-1}$ Mpc$^{-1}$ in the $H$ band, where the systematic uncertainties include the standard deviation of up to 21 variations of the analysis, the 0.7% distance scale systematic from SHOES Cepheid anchors, a photometric zeropoint systematic, and a cosmic variance systematic. Our final measurement represents a measurement with a precision of 2.8% in both bands. The variant with the largest change in $H_0$ is when limiting the sample to SNe from CSP and CfA programmes, noteworthy because these are the best calibrated, yielding $H_0sim75$ km s$^{-1}$ Mpc$^{-1}$ in both bands. We demonstrate stretch and reddening corrections are still useful in the NIR to standardize SN Ia NIR peak magnitudes. Based on our results, in order to improve the precision of the $H_0$ measurement with SNe Ia in the NIR in the future, we would need to increase the number of calibrator SNe Ia, be able to extend the Hubble-Lema^itre diagram to higher-z, and include standardization procedures to help reducing the NIR intrinsic scatter. arXiv: http://arxiv.org/abs/http://arxiv.org/abs/2209.02546v1

A new disease on the block is cause for concern, but how much should we be worried about the erroneously named Monkeypox virus? Claire finds out more on this week's show. And Chris explains what the Hubble constant is, and how it should be able to tell us how fast the universe is expanding, but it may reveal potential flaws in the way we think about physics. Photo by Brett Ritchie on Unsplash

Chat with Nobel Prize winner Adam Riess about his team's newest measurements of the 'most important number in cosmology' the Hubble Constant. Using the Hubble Space Telescope for what it was meant to do, Adam's team continues to make ultra-precise measurements. We'll also explore the Hubble Tension, the future of Hubble now that the James Webb Space Telescope has deployed, and other cosmic conundrums. Adam is a brilliant teacher and a wonderful raconteur. Don't miss your chance to chat with a brilliant scientist about the most important topic in cosmology today! From the team: https://hubblesite.org/contents/news-releases/2022/news-2022-005 From CNN: Measuring the expansion rate of the universe was one of the Hubble Space Telescope's main goals when it was launched in 1990. Over the past 30 years, the space observatory has helped scientists discover and refine that accelerating rate – as well as uncover a mysterious wrinkle that only brand-new physics may solve. Hubble has observed more than 40 galaxies that include pulsating stars as well as exploding stars called supernovae to measure even greater cosmic distances. Both of these phenomena help astronomers to mark astronomical distances like mile markers, which have pointed to the expansion rate. In the quest to understand how quickly our universe expands, astronomers already made one unexpected discovery in 1998: “dark energy.” This phenomenon acts as a mysterious repulsive force that accelerates the expansion rate. And there is another twist: an unexplained difference between the expansion rate of the local universe versus that of the distant universe right after the big bang. Scientists don't understand the discrepancy but acknowledge that it's weird and could require new physics. “You are getting the most precise measure of the expansion rate for the universe from the gold standard of telescopes and cosmic mile markers,” said Nobel Laureate Adam Riess at the Space Telescope Science Institute and a distinguished professor at the Johns Hopkins University in Baltimore, in a statement. “This is what the Hubble Space Telescope was built to do, using the best techniques we know to do it. This is likely Hubble's magnum opus, because it would take another 30 years of Hubble's life to even double this sample size.” Adam Guy Riess (born December 16, 1969) is an American astrophysicist and Bloomberg Distinguished Professor at Johns Hopkins University and the Space Telescope Science Institute. He is known for his research in using supernovae as cosmological probes. Riess shared both the 2006 Shaw Prize in Astronomy and the 2011 Nobel Prize in Physics with Saul Perlmutter and Brian P. Schmidt for providing evidence that the expansion of the universe is accelerating. https://www.stsci.edu/~ariess/ Please Visit our Sponsors: LinkedIn: LinkedIn.com/impossible to post a job for FREE Athletic Greens, makers of AG1 which I take every day. Get an exclusive offer when you visit https://athleticgreens.com/impossible AG1 is made from the highest quality ingredients, in accordance with the strictest standards and obsessively improved based on the latest science. Connect with Brian: https://twitter.com/DrBrianKeating  https://facebook.com/losingthenobelprize  https://instagram.com/DrBrianKeating  Please join my mailing list; just click here http://briankeating.com/mailing_list.php  Produced by Stuart Volkow (P.G.A) and Brian Keating Edited by Stuart Volkow Music:  Yeti Tears Miguel Tully - www.facebook.com/yetitears/ Theo Ryan - http://the-omusic.com/

Chat with Nobel Prize winner Adam Riess about his team's newest measurements of the 'most important number in cosmology' the Hubble Constant. Using the Hubble Space Telescope for what it was meant to do, Adam's team continues to make ultra-precise measurements. We'll also explore the Hubble Tension, the future of Hubble now that the James Webb Space Telescope has deployed, and other cosmic conundrums. Adam is a brilliant teacher and a wonderful raconteur. Don't miss your chance to chat with a brilliant scientist about the most important topic in cosmology today! From the team: https://hubblesite.org/contents/news-releases/2022/news-2022-005 From CNN: Measuring the expansion rate of the universe was one of the Hubble Space Telescope's main goals when it was launched in 1990. Over the past 30 years, the space observatory has helped scientists discover and refine that accelerating rate – as well as uncover a mysterious wrinkle that only brand-new physics may solve. Hubble has observed more than 40 galaxies that include pulsating stars as well as exploding stars called supernovae to measure even greater cosmic distances. Both of these phenomena help astronomers to mark astronomical distances like mile markers, which have pointed to the expansion rate. In the quest to understand how quickly our universe expands, astronomers already made one unexpected discovery in 1998: “dark energy.” This phenomenon acts as a mysterious repulsive force that accelerates the expansion rate. And there is another twist: an unexplained difference between the expansion rate of the local universe versus that of the distant universe right after the big bang. Scientists don't understand the discrepancy but acknowledge that it's weird and could require new physics. “You are getting the most precise measure of the expansion rate for the universe from the gold standard of telescopes and cosmic mile markers,” said Nobel Laureate Adam Riess at the Space Telescope Science Institute and a distinguished professor at the Johns Hopkins University in Baltimore, in a statement. “This is what the Hubble Space Telescope was built to do, using the best techniques we know to do it. This is likely Hubble's magnum opus, because it would take another 30 years of Hubble's life to even double this sample size.” Adam Guy Riess (born December 16, 1969) is an American astrophysicist and Bloomberg Distinguished Professor at Johns Hopkins University and the Space Telescope Science Institute. He is known for his research in using supernovae as cosmological probes. Riess shared both the 2006 Shaw Prize in Astronomy and the 2011 Nobel Prize in Physics with Saul Perlmutter and Brian P. Schmidt for providing evidence that the expansion of the universe is accelerating. Connect with Brian: https://twitter.com/DrBrianKeating  https://facebook.com/losingthenobelprize  https://instagram.com/DrBrianKeating  Please join my mailing list; just click here http://briankeating.com/mailing_list.php  Produced by Stuart Volkow (P.G.A) and Brian Keating Edited by Stuart Volkow Music:  Yeti Tears Miguel Tully - www.facebook.com/yetitears/ Theo Ryan - http://the-omusic.com/

Space Nuts Episode 306 with Professor Fred Watson & Andrew Dunkley •Two near-earth asteroids that we're keeping an eye on•The Hubble Constant and our ever-expanding universe - issues have arisen, that are mystifying cosmologists. Fred has the details.•Listener questions – We have questions about white holes and another about gravity Fred has the answers.Sponsor Links:NordVPN – the fast and best way of securing your data. Get our special price, plus one month free and a bonus gift by visiting https://nordvpn.com/spacenuts and using the code SPACENUTS.The Space Nuts Premium edition is now available on Spotify for our Supercast subscribers (sorry, Patreon isn't there yet…fingers crossed). To access the premium feed, just log in to your Spotify account and do a search. Use your current subscriber details to unlock the premium content. If you'd like to become a subscriber, just visit https://spacenuts.supercast.tech and sign up. You even get a 30-day free trial to see if it's right for you. Nothing to lose.Premium Editions also now available via subscription through Apple Podcasts…again with a 30-day free trial.For more Space Nuts, visit our websites. Links: https://linktr.ee/biteszHQ New: Listen to Space Nuts on your favorite app with the Universal listen link: https://spacenutspodcast.com/listen Are you a Discord fan? If so…come and join our ever-growing community. https://discord.gg/V4822WSmnJ If you find value in Andrew & Fred's work, you might like to consider buying them a coffee. They'd really appreciate the break. Thank you… https://www.buymeacoffee.com/spacenuts New link: https://spacenuts.io Send us a message, ask a question…whatever. We love hearing from you: https://www.speakpipe.com/spacenutsFind all our show links at https://linktr.ee/biteszHQ Take the Space Nuts Listener Feedback survey. We need to know how you think the show is going. Take the 1-minute survey at https://spacenutspodcast.com/feedback - thank you.If you love this podcast, please get someone else to listen to. Thank you…For more podcast listening, visit our HQ at https://bitesz.com

This week, the recent monkeypox outbreak, medicinal magic mushrooms, a shark-infested volcano erupts, flaws in the Hubble constant, and Lawrence Krauss on gender inequality in Universities.

Over the past three decades, astronomers around the world have been using the observations of the Hubble Space Telescope to more precisely calculate the expansion of the universe. And they have converged on a precision of just over 1%. Plus, Boeing launches Starliner, Voyager 1 struggles, and Erik reviews his favorite camera lens.

The Hubble Constant tells us how fast the universe is expanding. However, different methods of measuring the Hubble Constant give different results. In this podcast, NOIRLab's John Blakeslee describes data his team has collected to help resolve this discrepancy.  Bio: Rob Sparks is in the Communications, Education and Engagement group at NSF's NOIRLab. John Blakeslee is an Astronomer at NSF's NOIRLab studying galaxies, galaxy clusters, and the expansion of the universe. He completed his PhD at MIT, followed by a postdoctoral fellowship at the CalTech. Dr Blakeslee has worked as a Research Scientist with the Hubble Space Telescope's Advanced Camera project at Johns Hopkins University, a faculty member at Washington State University, a Staff Astronomer with the Canadian National Research Council in Victoria, British Columbia, and the Chief Scientist of Gemini Observatory. In addition to doing research, he now serves as the Head of Science Staff for Observatory Support at NOIRLab.   Links: https://noirlab.edu/public/news/noirlab2123/ https://noirlab.edu/public/blog/hubble-constant-result/ NOIRLab social media channels can be found at: https://www.facebook.com/NOIRLabAstro https://twitter.com/NOIRLabAstro https://www.instagram.com/noirlabastro/ https://www.youtube.com/noirlabastro   We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs.  Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too!  Every bit helps! Thank you! ------------------------------------ Do go visit http://www.redbubble.com/people/CosmoQuestX/shop for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! http://cosmoquest.org/Donate This show is made possible through your donations.  Thank you! (Haven't donated? It's not too late! Just click!) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. http://www.psi.edu Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org.

Answering the Most Important Problem in Cosmology Today: Is the Tension in the Hubble Constant Real? Scientific Sense ® by Gill Eapen: Professor Wendy Freedman is Professor of Astronomy and Astrophysics at the University of Chicago. Her current projects involve measurements of the Hubble constant -- the current expansion rate, as well as the past expansion rate, providing constraints on the acceleration of the universe and dark energy. --- Send in a voice message: https://anchor.fm/scientificsense/message

The universe is expanding and fast - but how fast? The answer lies in the 'Hubble Constant' but what is that? Steffen Hagstotz - Astronomer & Postdoctoral Researcher in the Department of Physics at Stockholm University explained all to Jonathan McCrea on Futureproof.  Listen and subscribe to Futureproof with Jonathan McCrea on Apple Podcasts and Spotify.    Download, listen and subscribe on the Newstalk App.     You can also listen to Newstalk live on newstalk.com or on Alexa, by adding the Newstalk skill and asking: 'Alexa, play Newstalk'.

Learn why Easter Island never had a population collapse; and how scientists are measuring the expansion of our universe. Easter Island never had a population collapse, as commonly believed by Grant Currin Resilience, not collapse: What the Easter Island myth gets wrong. (2021, July 13). EurekAlert! https://www.eurekalert.org/news-releases/793195 ‌Johnson, S. (2021, July 16). Busting the Easter Island myth: there was no civilization collapse. Big Think; Big Think. https://bigthink.com/culture-religion/easter-island  ‌DiNapoli, R. J., Crema, E. R., Lipo, C. P., Rieth, T. M., & Hunt, T. L. (2021). Approximate Bayesian Computation of radiocarbon and paleoenvironmental record shows population resilience on Rapa Nui (Easter Island). Nature Communications, 12(1). https://doi.org/10.1038/s41467-021-24252-z  Scientists can't decide how fast the universe is expanding, but this scientist says there's no conflict at all by Briana Brownell “There may not be a conflict after all” in expanding universe debate. (2021). EurekAlert! https://www.eurekalert.org/pub_releases/2021-06/uoc-mn062921.php ‌ Freedman, W. L. (2021). Measurements of the Hubble Constant: Tensions in Perspective. arXiv preprint https://arxiv.org/abs/2106.15656  Follow Curiosity Daily on your favorite podcast app to learn something new every day withCody Gough andAshley Hamer. Still curious? Get exclusive science shows, nature documentaries, and more real-life entertainment on discovery+! Go to https://discoveryplus.com/curiosity to start your 7-day free trial. discovery+ is currently only available for US subscribers. See omnystudio.com/listener for privacy information.

Astronomy is a science of numbers. And none is more important than the Hubble constant — a measurement of how fast the universe is expanding. Astronomers have been refining that number for decades. But they don’t yet agree on just what it should be. The number is named for Edwin Hubble, who discovered that the universe is expanding. He also found that there’s a relationship between the distance to a remote galaxy and how fast the galaxy is moving away from us as a result of that expansion. He used that relationship to calculate the rate of expansion. After Hubble, other astronomers used several types of stars to get better measurements of the distances to other galaxies — and how fast the galaxies were moving away from us. In the language of astronomy, that yielded a value for the Hubble constant of about 74 kilometers per second per megaparsec. In other words, for every million light-years you travel away from Earth, the rate of expansion increases by about 50,000 miles per hour. But a technique that measures the “afterglow” of the Big Bang came up with a smaller number. And a third method, which measures dying stars, recently came up with a number that’s between the other two. So there’s still no agreement on the Hubble constant — one of the most important numbers in astronomy. It’s especially important because the expansion rate helps astronomers determine the age of the universe. More about that tomorrow. Script by Damond Benningfield Support McDonald Observatory

A simplified description of one method we can use to calculate the age of the universe using the Hubble Constant.

Paul Hill, Ralph Wilkins and Jenifer Millard host. Damien Phillips and John Wildridge produce. The Discussion: As we welcome in the New Year, we discuss the holiday season and your suggestions to replace the Guide to the Electromagnetic Spectrum section of the show.   The News: Rounding up the astronomy news at the beginning of 2021, we have: - Finding exoplanets that have a good chance of being able to see us. - The ‘Lithium Problem’. - Chasing down the Hubble Constant. - A new method for detecting exoplanets. - Was there another dwarf planet in the inner solar system? Main News story: That intriguing radio signal found coming from the vicinity of Proxima Centauri.   The Sky Guide: This month we’re taking a look at the great winter constellation of Auriga with a guide to its history, how to find it, a couple of deep sky objects and a round-up of the solar system views on offer in January.   Q&A: We know there is a lower temperature limit (absolute zero), but is there an upper temperature limit? From Matt in California.   http://www.awesomeastronomy.com   Bio: Awesome Astronomy is a podcast beamed direct from an underground bunker on Mars to promote science, space and astronomy (and enslave Earth if all goes well).   We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too! Every bit helps! Thank you! ------------------------------------ Do go visit http://astrogear.spreadshirt.com/ for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! http://cosmoquest.org/Donate This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just click!) The 365 Days of Astronomy Podcast is produced by Astrosphere New Media. http://www.astrosphere.org/ Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org.

5 out of the 7 extraterrestrial planets in our solar system were discovered by the same man; his name was Galileo Galilei. In 1609, after hearing about Hans Lippershey's Dutch Perspective Glasses, Galileo designed his own telescope.. In only a few days, without ever having seen one. This telescope was orders of magnitude better than Lippershey's patented telescope, and allowed him to explore the cosmos in a way unheard of before. He discovered Venus, Mars, Jupiter, and Saturn, all with that same telescope he had recently built. As time progressed forwards, the telescopes we used progressed as well. We went from the small 30x magnification telescope of the Galilean age to the massive, 30 meter aperture observatories that could magnify objects orders of magnitude more than Galileo's. The telescope is, without a doubt, the most important scientific invention that has ever existed; with it, Galileo discovered four planets and Jupiter's moons, William Herschel discovered Uranus and formulated the Catalogue of Nebulae and Clusters of Stars, Charles Messier detailed 110 large deep sky objects in a catalogue known as the Messier Catalogue, Edwin Hubble discovered the Hubble Constant (~70 km/s per megaparsec), Gerard Kuiper discovered the CO2 content on Mars and the icy rings of Saturn, and how Carl Sagan learned the riches of the cosmos and sought to communicate it to all corners of the earth. While telescopes are the greatest piece of technology humans have ever created, it is not practical for everything. There are some events that are so incredible and obvious that we can see them with our naked eyes, with nothing but our eyes and a passion for the night sky. December 21st is one of those times, as Jupiter and Saturn will come within .1 degrees of each other in the night sky in what is known as the Great Conjunction, forming a superstar that has not been visible to humans since 1226. If you have any questions, comments, concerns, or corrections, please email me using the address provided: learningbywilliam@gmail.com References: Inventors and Developers of the Telescope https://www.space.com/21950-who-invented-the-telescope.html Galileo Galilei- Information https://en.wikipedia.org/wiki/Galileo_Galilei Great Conjunction of Jupiter and Saturn https://en.wikipedia.org/wiki/Great_conjunction Conjunctions in Astronomy https://en.wikipedia.org/wiki/Conjunction_(astronomy) Ecliptic Coordinate System - Celestial Sphere in Astronomy https://en.wikipedia.org/wiki/Ecliptic_coordinate_system The Star of Bethlehem and its Theoretical Relation to the Great Conjunction https://en.wikipedia.org/wiki/Star_of_Bethlehem EDIT: A correction has been made to the number of planets Galileo discovered. In thee description and in the podcast, it was said that Galileo discovered four planets- Venus, Mars, Jupiter, and Saturn, but Galileo actually discovered five- includes Mercury.

Μιλάμε για τη δημοσίευση του Thomas M. Sedgwick και των συνεργατών του, στο περιοδικό Monthly Notices of the Royal Astronomical Society, που μελέτησαν το ρόλο των ταχυτήτων που έχουν οι υπερκαινοφανείς στη μέτρηση της ταχύτητας διαστολής του Σύμπαντος. Βιβλιογραφική αναφορά: Thomas M Sedgwick, Chris A Collins, Ivan K Baldry, Philip…

The Astronomy, Technology and Space Science News Podcast.SpaceTime with Stuart Gary Series 23 Episode 102*New study claims the Sun may have had a binary partnerA new study suggests the Sun may once have been part of a binary star system with a companion of similar mass.*A new more puzzling view of the universeNew data from the Slone Digital Sky Survey suggests the current rate of expansion of the universe – known as the Hubble Constant -- is about 10 percent lower than the expansion rate measured from distances to very nearby galaxies.*Astra Rocket Launch failureSpace is hard as Astra aerospace now knows following the failure of its latest launch attempt from the Alaskan Pacific Space Port Complex on Kodiak Island.*The Science ReportNew study confirms wildlife populations have plunged by 68% between 1970 and 2016.Claims turmeric extract may help to combat pain in people with osteoarthritis in their knees.The locus of male sexual desire has been uncovered in specific regions of the brain.Archaeologists have discovered the ruins of a 2600 year old royal building in Jerusalem.Sponsor Details:This episode of SpaceTime is brought to with the support of ExpressVPN - Rated No.1 by TechRadar. It's the one we use…to get three months free with any 12 month package, visit www.tryexpressvpn.com/space and help support the show.Your online presence begins with a great domain name. Find your perfect one with NameCheap's powerful tools. Visit spacetimewithstuartgary.com/namcheap for more details and help support the show. Keep forgetting passwords? Then you need LastPass password manager….it’s one we use and is a lifesaver. Check it out for free at spacetimewithstuartgary.com/lastpass and help support the show. For more SpaceTime visit https://spacetimewithstuartgary.com (mobile friendly). For enhanced Show Notes including photos to accompany this episode, visit: http://www.bitesz.com/spacetimeshownotesGet immediate access to over 200 commercial-free, double and triple episode editions of SpaceTime plus extended interview bonus content. Subscribe via Patreon or Supercast....and share in the rewards. Details at www.patreon.com/spacetimewithstuartgary or Supercast - https://bitesznetwork.supercast.tech/RSS feed: https://rss.acast.com/spacetime Email: SpaceTime@bitesz.comTo receive the Astronomy Daily Newsletter free, direct to your inbox...just join our mailing list at www.bitesz.com/mailinglist or visit https://www.bitesz.com/astronomy-daily Support this show http://supporter.acast.com/spacetime. See acast.com/privacy for privacy and opt-out information.

When it comes to the expansion rate of the universe, trying to get a straight answer isn’t easy. That’s because the two best ways of measuring what’s known as the Hubble constant are giving different results. As each method becomes increasingly accurate, the gap between widens. Is one of them wrong? Or is it time to rejig the Standard Model of Cosmology? Madeleine Finlay investigates the so-called ‘Hubble tension’ with Prof Erminia Calabrese. Help support our independent journalism at theguardian.com/sciencepod

Astrophysicists are currently struggling to explain an inconsistency that has become a cosmological crisis, and it has to do with the Hubble Constant, which determines the expansion of the universe. Special thanks to Dr. Becky Smethurst for chatting with me! You can follow her channel at: https://www.youtube.com/channel/UCYNbYGl89UUowy8oXkipC-Q

Debates over the shape of the Earth and the rate of the universe's expansion have a very different feel

Ninety years ago we first measured the rate of our expanding Universe. Today our accuracy is better but the new techniques are producing different numbers. Are there gremlins in our measurements or is it the Universe travelling in unexpected ways ?  Dr Karl and Prof Geraint Lewis discuss this huge question. http://www.physics.usyd.edu.au/~gfl/ http://drkarl.com

https://www.youtube.com/watch?v=qLOiaicNyA8 Streamed live on Mar 19, 2020. There's been a lot of upheaval in the field of cosmology with respect to the Hubble Constant. Two independent lines of evidence point to markedly different conclusions. Oh boy.   We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too! Every bit helps! Thank you! ------------------------------------ Do go visit http://astrogear.spreadshirt.com/ for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! http://cosmoquest.org/Donate This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just click!) The 365 Days of Astronomy Podcast is produced by Astrosphere New Media. http://www.astrosphere.org/ Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org.

In this week's live QA, I explain why a black hole can have infinite density but not infinite gravity. Does your perception of time change due to your mass, and am I ever intimidated by the people I get to interview? 03:00 How can a singularity have infinite density and not infinite gravity? 06:02 Does your perception of time change due to your mass? 08:10 How do I feel about String Theory? 10:20 Am I intimidated by people I interview? 12:47 Is intelligent design a scientific theory? 15:21 Why don't we see practical applications on quantum mechanics? 16:34 Anyone on my wishlist of guests? 19:00 Are there alien bodies at Area-51? 20:25 Would you feel it falling into a supermassive black hole 22:00 Will we get a Grand Unified Theory in our lifetimes? 27:21 Is Blue Origin for real? 30:35 Should the US have built the super collider? 34:17 Does time go backwards if you exceed the speed of light? 35:20 What's happening with Perseverance? 37:03 Could we jumpstart a rocket planet to get a magnetosphere? 40:35 How far are we from a nuclear rocket? 42:50 Could they make a bigger particle accelerator? 45:00 Would I get neurolink? 46:42 Humans on the Moon or a 30M telescope? 48:02 Have I watched Upload yet? 48:25 Why don't we explore the deep ocean first? 51:45 Wouldn't a solar sail be stopped by photons from another star? 53:49 Could we use Ceres or Vesta to warm up Mars? 54:52 Why is the Hubble Constant increasing? Our Book is out! https://www.amazon.com/Universe-Today-Ultimate-Viewing-Cosmos/dp/1624145442/ Audio Podcast version: ITunes: https://itunes.apple.com/us/podcast/universe-today-guide-to-space-audio/id794058155?mt=2 RSS: https://www.universetoday.com/audio What Fraser's Watching Playlist: https://www.youtube.com/playlist?list=PLbJ42wpShvmkjd428BcHcCEVWOjv7cJ1G Weekly email newsletter: https://www.universetoday.com/newsletter Weekly Space Hangout: https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg/ Astronomy Cast: https://www.youtube.com/channel/UCUHI67dh9jEO2rvK--MdCSg Support us at: https://www.patreon.com/universetoday More stories at: https://www.universetoday.com/ Twitch: https://twitch.tv/fcain Follow us on Twitter: @universetoday Like us on Facebook: https://www.facebook.com/universetoday Instagram - https://instagram.com/universetoday Team: Fraser Cain - @fcain / frasercain@gmail.com Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw Chad Weber - weber.chad@gmail.comSupport Universe Today Podcast

In this week's live QA, I explain why a black hole can have infinite density but not infinite gravity. Does your perception of time change due to your mass, and am I ever intimidated by the people I get to interview? 03:00 How can a singularity have infinite density and not infinite gravity? 06:02 Does your perception of time change due to your mass? 08:10 How do I feel about String Theory? 10:20 Am I intimidated by people I interview? 12:47 Is intelligent design a scientific theory? 15:21 Why don't we see practical applications on quantum mechanics? 16:34 Anyone on my wishlist of guests? 19:00 Are there alien bodies at Area-51? 20:25 Would you feel it falling into a supermassive black hole 22:00 Will we get a Grand Unified Theory in our lifetimes? 27:21 Is Blue Origin for real? 30:35 Should the US have built the super collider? 34:17 Does time go backwards if you exceed the speed of light? 35:20 What's happening with Perseverance? 37:03 Could we jumpstart a rocket planet to get a magnetosphere? 40:35 How far are we from a nuclear rocket? 42:50 Could they make a bigger particle accelerator? 45:00 Would I get neurolink? 46:42 Humans on the Moon or a 30M telescope? 48:02 Have I watched Upload yet? 48:25 Why don't we explore the deep ocean first? 51:45 Wouldn't a solar sail be stopped by photons from another star? 53:49 Could we use Ceres or Vesta to warm up Mars? 54:52 Why is the Hubble Constant increasing? Our Book is out! https://www.amazon.com/Universe-Today-Ultimate-Viewing-Cosmos/dp/1624145442/ Audio Podcast version: ITunes: https://itunes.apple.com/us/podcast/universe-today-guide-to-space-audio/id794058155?mt=2 RSS: https://www.universetoday.com/audio What Fraser's Watching Playlist: https://www.youtube.com/playlist?list=PLbJ42wpShvmkjd428BcHcCEVWOjv7cJ1G Weekly email newsletter: https://www.universetoday.com/newsletter Weekly Space Hangout: https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg/ Astronomy Cast: https://www.youtube.com/channel/UCUHI67dh9jEO2rvK--MdCSg Support us at: https://www.patreon.com/universetoday More stories at: https://www.universetoday.com/ Twitch: https://twitch.tv/fcain Follow us on Twitter: @universetoday Like us on Facebook: https://www.facebook.com/universetoday Instagram - https://instagram.com/universetoday Team: Fraser Cain - @fcain / frasercain@gmail.com Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw Chad Weber - weber.chad@gmail.com

https://www.youtube.com/watch?v=kPw8oLrTk5A Published on May 2, 2019. Let's talk about how constant the Hubble Constant isn't. It should actually be called the Hubble Parameter. Let's also talk a bit about the problems facing modern cosmology.   We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: https://www.patreon.com/365DaysOfAstronomy and donate as much as you can! Share the podcast with your friends and send the Patreon link to them too! Every bit helps! Thank you! ------------------------------------ Do go visit http://astrogear.spreadshirt.com/ for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! http://cosmoquest.org/Donate This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just click!) The 365 Days of Astronomy Podcast is produced by Astrosphere New Media. http://www.astrosphere.org/ Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org.

Astrophiz 94: Amanda Wherrett: ANU Siding Spring Observatory This wonderful episode features Amanda Wherrett from the Australian National University and who conducts wonderful tours of the Siding Spring Observatory in remote New South Wales in Australia. Amanda shares with us the absolute best observing tip you will hear in your whole life, and she tells us all about this stunning mountain and it’s remarkable array of observatories, research telescopes and instruments and the astronomers who work there. Listen: https://soundcloud.com/astrophiz/astrophiz-94-amanda-wherrett-anu-siding-spring-observatory In the sky for observers and astrophotographers: Our regular feature ‘What’s Up Doc’ is with Dr Ian ‘Astroblog’ Musgrave. He previews the excellent planet viewing opportunities over the next two weeks, and in ‘Ian’s Tangent’ he tells us about Asteroid Hygiea, the 4th largest body and possibly soon to be promoted to ‘dwarf planet’ in the asteroid belt. Ian explains our classification criteria for dwarf planets and upcoming viewing opportunities for Hygiea and Vesta. In the News: .1. Dr AG Suvorov, University of Tubingen in Germany in ArXiv gives more hints about the mechanism for repeating FRBs. No definitive answers yet, but definitely edging closer. Watch this space. .2. “Nasa's Voyager 2 sends back its first message from interstellar space” .3. A final word: If anyone has an answer to the current debate about the Hubble Constant, please let me know. Next Episodes: Our very next episode is a fabulous interview with Steve Olney, the amateur radio astronomer who captured the 2019 Vela Glitch in radio frequencies as it happened, and who we talked about in Episode 93 with Dr Jim Palfreyman. This is Citizen Science writ large and another great episode to look forward to. Following Steve, you can look forward to our first ‘Are We Alone’ feature episode with Professor Geraint Lewis, and then we take a well-earned summer holiday break over the festive season. In the New Year, we will talk with Dr Belinda Nicholson over in the UK, Wael Farah on his use of AI to capture FRB signals from MOST in real time, and we have lined up alien communication specialist researcher Daniel Oberhaus, who is the author of his new book ‘Extraterrestrial Languages’. And then we have our milestone 100th episode and we are thrilled to confirm Dr Vanessa Moss will be our guest for this special episode.

Some clever detective work has found one of the smallest black holes known. The astroquarks also take a look at the puzzling mess of the Hubble Constant and the disagreement over its value. Plus, the interstellar comet's supply of water seems consistent with our own solar comets, and the Lagrange Points (the musical quintet, not the set of gravitational potential equilibria in an orbiting two-body system, duh!) sponsor our show. Tune in for all that and universal trivia. It's a veritable astroquark soup!

Bernheim Arboretum & Research Forest is under threat of eminent domain. Hear about the gas pipeline and interstate highway connector that is proposed to pass through Bernheim Forest land. Did you know that the astronomer who discovered the existence of other galaxies used to live in Louisville, Kentucky? Its fitting that the Hubble Telescope was named after Edwin P. Hubble. Professor Scott Miller builds on this story with an update on the Hubble Constant and what that tells us about the expanding universe! The public-domain music heard on this episode is 'Marimba on the Hunt' by Daniel Birch. Bench Talk is a weekly program that airs on WFMP Louisville FORward Radio 106.5 FM (forwardradio.org) every Monday at 7:30 pm, Tuesday at 11:30 am, and Wednesday at 7:30 am. Visit our Facebook page for links to the articles discussed in this episode: https://www.facebook.com/pg/BenchTalkRadio/ Bench Talk: The Week in Science | Bernheim Pipeline; Edwin Hubble & Hubble Constant | Sept 9, 2019 by Forward Radio is licensed under a Creative Commons License.

Bernheim Arboretum & Research Forest is under threat of eminent domain. Hear about the gas pipeline and interstate highway connector that is proposed to pass through Bernheim Forest land. Did you know that the astronomer who discovered the existence of other galaxies used to live in Louisville, Kentucky? Its fitting that the Hubble Telescope was named after Edwin P. Hubble. Professor Scott Miller builds on this story with an update on the Hubble Constant and what that tells us about the expanding universe! The public-domain music heard on this episode is 'Marimba on the Hunt' by Daniel Birch. Bench Talk is a weekly program that airs on WFMP Louisville FORward Radio 106.5 FM (forwardradio.org) every Monday at 7:30 pm, Tuesday at 11:30 am, and Wednesday at 7:30 am. Visit our Facebook page for links to the articles discussed in this episode: https://www.facebook.com/pg/BenchTalkRadio/posts/?ref=page_internal

Brandeis assistant professor of physics Marcelle Soares-Santos explains why the constant is so difficult to calculate and how her new approach might finally get it right.

One of the most important numbers in Cosmology makes up this episode’s question: what is the Hubble Constant? If you have feedback or a topic suggestion, email us.

We've known since Edwin Hubble's time that the universe has been expanding. What we've only recently learned (like, in the past 10 years or so) is that the universe is accelerating as it expands. Measuring this expansion rate has been problematic and while there are at least two different ways to make the measurement, they don't always agree. This episode features Ed Macauley from the University of Portsmouth UK, and a member of the Dark Energy Survey collaboration. He and his team have been using a calibrated version of the 'standard candle' method of determining the rate of universal expansion, also known as the Hubble Constant or H0 to get a better answer that agrees with other measurement techniques. You can read Ed's paper on Arxiv.org here: https://arxiv.org/pdf/1811.02376.pdf --- Support this podcast: https://anchor.fm/deepastronomy/support

This episode contains: We recorded this ep on a Sunday. Devon’s been a single dad for the weekend and tell a little about it. This Week in Space: Scientists are going to be able to use gravitational waves to calculate the Hubble Constant. The two previous methods, using super nova and the microwave background radiation of the universe have yielded conflicting results so this will hopefully find the true rate of expansion. The gravitational waves are produced form colliding neutron stars. https://www.sciencedaily.com/releases/2019/02/190214115549.htm Sweet Emotion: Steven finds a list of names of emotions we didn’t know had names. We go through most of them and discuss how they make us feel. https://www.geeksaresexy.net/2019/02/25/23-emotions-people-feel-but-cant-explain/ Sci-Fi: We talk about Umbrella Academy. Devon thinks his expectations were too high. It was still okay. Devon has also finally started watching this season of Star Trek: Discovery. It’s good but still flawed. The new/temporary captain is a lot better and they are trying to get into more of the moral questions that the older shows did. Also, the Mandalorian has finished filming and the Star Wars park at Disney is looking pretty cool. We also talk about Star Wars: Always. https://www.youtube.com/watch?v=JdoWJywrOuw

Learn about how the universe’s rate of expansion could change our understand of physics; how the saliva in your body changes to enjoy bitter flavors; and the biggest factors that determine how much you pay for a flight, along with some tips on finding the cheapest airplane tickets. In this podcast, Cody Gough and Ashley Hamer discuss the following stories from Curiosity.com to help you get smarter and learn something new in just a few minutes: The Universe Is Expanding, But How Fast Is Up for Debate — https://curiosity.im/2DK9Xy5   Learning to Like Bitter Flavors Isn't Just in Your Head — It's in Your Saliva — https://curiosity.im/2DMsgTa Tuesday Is No Longer the Best Day to Book a Flight — https://curiosity.im/2DMwDxE Please tell us about yourself and help us improve the show by taking our listener survey! https://www.surveymonkey.com/r/curiosity-listener-survey If you love our show and you're interested in hearing full-length interviews, then please consider supporting us on Patreon. You'll get exclusive episodes and access to our archives as soon as you become a Patron! Learn about these topics and more on Curiosity.com, and download our 5-star app for Android and iOS. Then, join the conversation on Facebook, Twitter, and Instagram. Plus: Amazon smart speaker users, enable our Alexa Flash Briefing to learn something new in just a few minutes every day!

In this podcast extra, we discuss the changing value of the Hubble Constant since 2000 – or put more simply, our narrowing down of how quickly the universe is expanding. This discussion takes in: The history of the Hubble Constant Edwin Hubble’s dreadful scatter plot Further attempts to narrow down the universe’s expansion rate Why research papers are awesome and accessible to everyone

Dr. Rachael Beaton and I try “Grass Jelly Drink” and talk about one of the major fundamental constants of the universe; the Hubble Constant. She explains what it is and why she and her colleagues are trying to measure it better than it ever has been measured before.

Episode #252: Scientific opinions of the end times; Does Satan have the power to take lives?; Measurements of the Hubble constant

AstronomyCast 279: The Hubble Constant, by Fraser Cain & Dr. Pamela Gay

Transcript: For galaxies velocity is proportional to distance, and the constant in proportionality in this linear relationship is called the Hubble constant given by the large letter H and the subscript zero. It’s defined therefore as velocity divided by distance, and in astronomers units it has units of kilometers per second per megaparsec. Modern measurements place the best value of the Hubble constant at around H0 of seventy kilometers per second per megaparsec. This means, for example, that a galaxy moving with a recession velocity of seven hundred kilometers per second is at a typical distance of ten megaparsecs or thirty-three million lightyears whereas a galaxy moving with a recession velocity of seven thousand kilometers per second is at a distance of a hundred megaparsecs, and so on. The Hubble constant gives the expansion rate of the universe. A higher value implies a younger, smaller universe, and a lower value would imply an older, larger universe.

Transcript: The Hubble constant sets the current expansion rate of the universe and gives an indication of its size and age. The best currently measured value of the Hubble constant comes from a heroic project done with the Hubble Space Telescope over a number of years. The Hubble Space Telescope project was based on observations of Cepheid variables as the distance indicator because they represent well understood physics that can be applied across large distances in space. Several dozen galaxies were observed out to a distance of fifty to sixty million lightyears. The observations involved multiple epochs of single galaxies to pick out the variable stars. This work had to be done with the Hubble Space Telescope because of the crowded stellar regions making it difficult to disentangle the variable stars in crowded fields. A lot of it was done in the infrared to minimize the effects of dust obscuration and reddening. The result of this project was a measurement of the Hubble constant of about seventy kilometers per second per megaparsec with an accuracy of ten percent. Although ten percent doesn’t sound like very high accuracy this enormous project showed that it would be very difficult to measure the expansion rate with higher precision.

Melvyn Bragg and his guests discuss the age of the Universe.Since the 18th century, when scientists first realised that the Universe had existed for more than a few thousand years, cosmologists have debated its likely age. The discovery that the Universe was expanding allowed the first informed estimates of its age to be made by the great astronomer Edwin Hubble in the early decades of the twentieth century. Hubble's estimate of the rate at which the Universe is expanding, the so-called Hubble Constant, has been progressively improved. Today cosmologists have a variety of other methods for ageing the Universe, most recently the detailed measurements of cosmic microwave background radiation - the afterglow of the Big Bang - made in the last decade. And all these methods seem to agree on one thing: the Universe has existed for around 13.75 billion years.With:Martin ReesAstronomer Royal and Emeritus Professor of Cosmology and Astrophysics at the University of CambridgeCarolin CrawfordMember of the Institute of Astronomy and Fellow of Emmanuel College at the University of CambridgeCarlos FrenkDirector of the Institute for Computational Cosmology at the University of Durham.Producer: Thomas Morris.

Melvyn Bragg and his guests discuss the age of the Universe.Since the 18th century, when scientists first realised that the Universe had existed for more than a few thousand years, cosmologists have debated its likely age. The discovery that the Universe was expanding allowed the first informed estimates of its age to be made by the great astronomer Edwin Hubble in the early decades of the twentieth century. Hubble's estimate of the rate at which the Universe is expanding, the so-called Hubble Constant, has been progressively improved. Today cosmologists have a variety of other methods for ageing the Universe, most recently the detailed measurements of cosmic microwave background radiation - the afterglow of the Big Bang - made in the last decade. And all these methods seem to agree on one thing: the Universe has existed for around 13.75 billion years.With:Martin ReesAstronomer Royal and Emeritus Professor of Cosmology and Astrophysics at the University of CambridgeCarolin CrawfordMember of the Institute of Astronomy and Fellow of Emmanuel College at the University of CambridgeCarlos FrenkDirector of the Institute for Computational Cosmology at the University of Durham.Producer: Thomas Morris.

Will the universe expand faster than the speed of light in the future? Is this even possible? Will there be a big crunch at the end? The answer's in this Question of the Week. Plus, we ask if it's possible to drink through your bottom! Like this podcast? Please help us by supporting the Naked Scientists