Podcasts about wmap

Dans cette vidéo, on plonge dans l'un des phénomènes les plus fascinants de l'astrophysique : le fond diffus cosmologique, ce rayonnement fossile émis 380 000 ans après le Big Bang, véritable première lumière de l'univers. Ce rayonnement cosmique, observable aujourd'hui sous forme de micro-ondes, est une archive précieuse de l'univers primordial. Grâce aux observations du télescope ACT (Atacama Cosmology Telescope) situé au Chili, une nouvelle avancée majeure a été réalisée, révélant des détails inédits sur la polarisation de la lumière, les variations de température dans l'univers naissant, et les mouvements de matière juste après l'ère de la recombinaison. On revient sur l'histoire de la découverte du fond diffus, des prédictions théoriques par George Gamow, Ralph Alpher et Robert Herman, jusqu'aux découvertes accidentelles de Penzias et Wilson, en passant par les observations de COBE, WMAP et Planck. Le fond diffus cosmologique n'est pas qu'une simple carte thermique : c'est une véritable empreinte du passé, un témoin direct des conditions initiales de l'univers, et une clé pour explorer des notions fondamentales comme l'énergie noire, la formation des premières étoiles, ou encore la structure à grande échelle de l'univers.

This episode is brought to you with the help of NORDVPN. To get your special Space Nuts discount and help support the show, visit www.nordvpn.com/spacenutsSpace Nuts Episode 505: Black Holes, TRAPPIST Planets, and Cosmic FluctuationsIn this engaging Q&A edition of Space Nuts, host Andrew Dunkley and astronomer Professor Fred Watson tackle a variety of listener questions that delve deep into the mysteries of the universe. From the nature of black holes and their gravitational effects to the intriguing dynamics of the TRAPPIST system, this episode is packed with thought-provoking discussions and cosmic insights that will keep you captivated.Episode Highlights:- Black Hole Mysteries: Andrew and Fred explore whether objects entering a black hole, such as electrons or grains of sand, can be accelerated beyond the speed of light. They clarify the laws of physics that remain intact even within the event horizon and the implications of mass changes.- TRAPPIST System Insights: The duo discusses the absence of gas giants in the TRAPPIST system and the possible reasons behind this phenomenon, including the formation processes and the potential for undiscovered planets.- Star Collisions: Lloyd from Cairns asks whether everyday stars like our sun ever collide, leading to a discussion about the rarity of such events compared to black hole and neutron star collisions, especially during galaxy mergers.- Early Universe Fluctuations: Mark from Louisiana poses a thoughtful question about the energy density fluctuations observed in the WMAP image of the early universe, prompting a conversation about quantum fluctuations and their role in cosmic structure formation.For more Space Nuts, including our continually updating newsfeed and to listen to all our episodes, visit our website. Follow us on social media at SpaceNutsPod on Facebook, X, YouTube Music Music, Tumblr, Instagram, and TikTok. We love engaging with our community, so be sure to drop us a message or comment on your favorite platform.If you'd like to help support Space Nuts and join our growing family of insiders for commercial-free episodes and more, visit spacenutspodcast.com/aboutStay curious, keep looking up, and join us next time for more stellar insights and cosmic wonders. Until then, clear skies and happy stargazing.(00:00) This is a Q and A edition where we answer audience questions(01:02) Doug Stone: I had a question about Earthrise from last year(05:14) Question comes from somebody who didn't tell us their name(06:32) Picking the voice is picking it. Yes. It's picking it(06:46) Could anything entering a black hole be accelerated beyond the speed of light(09:05) Some solar systems do not contain gas or ice giants, says Dave(12:40) Is there any limit to how many planets a solar system can form(15:46) Do everyday stars like our sun ever collide and what do they create(20:30) Mark Rabelais has a question about fluctuations in the early universe(27:08) New research suggests distant galaxies have a preferred direction of rotation(28:47) Andrew Dunkley: Thank you to everybody who sent, uh, in questionsBecome a supporter of this podcast: https://www.spreaker.com/podcast/space-nuts-exploring-the-cosmos--2631155/support.

In 1984, astronaut Bruce McCandless made history by floating 100 meters away from the space shuttle, completely untethered. Can you imagine that? Credit: STS-116 spacewalk 1: By STS-116 Shuttle Crew, NASA - https://apod.nasa.gov/apod/ap061225.html, https://commons.wikimedia.org/w/index... Bruce McCandless II: By NASA, https://commons.wikimedia.org/w/index... Bruce McCandless on mid-deck: By NASA - Great Images, https://commons.wikimedia.org/w/index... Astronaut James D. van Hoften: By NASA, https://commons.wikimedia.org/w/index... Astronaut Robert L. Stewart: By National Archives and Records Administration, https://commons.wikimedia.org/w/index... Crew of STS-107: By NASA, https://commons.wikimedia.org/w/index... STS-107 crew: By NASA, https://commons.wikimedia.org/w/index... Bumper8 launch: By NASA/U.S. Army, https://commons.wikimedia.org/w/index... Ham the chimp: By NASA - https://images.nasa.gov/details/S63-2..., https://commons.wikimedia.org/w/index... Historic Misson Control: By NASA, https://images.nasa.gov/details-jsc20... Gene Cernan Apollo 10: By NASA, https://commons.wikimedia.org/w/index... ISS-19 Crew members: By NASA, https://commons.wikimedia.org/w/index... Karen Nyberg: By NASA, https://commons.wikimedia.org/w/index... Bill McArthur: By NASA, https://commons.wikimedia.org/w/index... Bjarni V. Tryggvason: By NASA, https://commons.wikimedia.org/w/index... Astronaut Wilcutt: By NASA, National Archives, Still Pictures, https://commons.wikimedia.org/w/index... Chris Cassidy: By NASA - https://www.nasa.gov/image-feature/na..., Public Domain, https://commons.wikimedia.org/w/index... WMAP 2012: By NASA / WMAP Science Team, https://commons.wikimedia.org/w/index... CC BY 2.0 https://creativecommons.org/licenses/... Gene Cernan: By Kevin M. Gill - https://flic.kr/p/2dv9KUC, https://commons.wikimedia.org/w/index... Space Toilet: By Don DeBold - https://flic.kr/p/eeDyw4, https://commons.wikimedia.org/w/index... Russian Space Toilet: By Keith Errington, CC BY-SA 4.0 https://creativecommons.org/licenses/..., https://commons.wikimedia.org/w/index... Animation is created by Bright Side. Thumbnail. Attribution: Preview photo credit: EVAtion: By NASA - Great Images, https://commons.wikimedia.org/w/index... Animation is created by Bright Side. Animation is created by Bright Side. ---------------------------------------------------------------------------------------- Music from TheSoul Sound: https://thesoul-sound.com/ Check our Bright Side podcast on Spotify and leave a positive review! https://open.spotify.com/show/0hUkPxD... Subscribe to Bright Side: https://goo.gl/rQTJZz ---------------------------------------------------------------------------------------- Our Social Media: Facebook:   / brightside   Instagram:   / brightside.official   TikTok: https://www.tiktok.com/@brightside.of... Stock materials (photos, footages and other): https://www.depositphotos.com https://www.shutterstock.com https://www.eastnews.ru ---------------------------------------------------------------------------------------- For more videos and articles visit: http://www.brightside.me ---------------------------------------------------------------------------------------- This video is made for entertainment purposes. We do not make any warranties about the completeness, safety and reliability. Any action you take upon the information in this video is strictly at your own risk, and we will not be liable for any damages or losses. It is the viewer's responsibility to use judgement, care and precaution if you plan to replicate. Learn more about your ad choices. Visit megaphone.fm/adchoices

Podcast Episode 104 is about The Picture of the Cosmic Microwave Background captured first by the WMAP and then Planck telescope.

Astronomy Cast Ep. 219 - Planck Mission - REMASTER By Fraser Cain & Dr. Pamela Gay From February 7, 2011. Another mission named after a famous physicist. This time we're looking at the Planck mission, designed to study the Cosmic Microwave Background Radiation over the entire sky. Like the previous WMAP mission, this will help astronomers understand the first moments after the Big Bang.   This Episode is made possible thanks to our Patrons on Patreon. Join at the Galaxy Group level or higher to be listed in our YouTube videos.    This video was made possible by the following Patreon members: - BogieNet - Stephen Veit - Jeanette Wink - Siggi Kemmler - Andrew Poelstra - Brian Cagle - David Truog - Ed - David - Gerhard Schwarzer THANK YOU! - Fraser and Dr. Pamela

**CL033 Das Echo des Urknalls** _Die Episode über die kosmische Hintergrundstrahlung - was vom Urknall übrig blieb_ Ihr könnt uns bei Paypal https://paypal.me/cosmiclattepod bei Steady https://steadyhq.com/de/cosmiclatte/about und Patreon https://patreon.com/CosmiclattePodcast gerne unterstützen!

No século 20, descobertas revolucionárias abalaram a visão estática do cosmos. A constatação da expansão contínua do universo desafia conceitos antigos, revelando a existência de energia e matéria escuras, enigmas cruciais na cosmologia. A inadequação das teorias atuais para explicar a expansão acelera do universo revela coisas fundamentais do espaço, tempo e gravidade, que não estamos percebendo, revelando um cosmos mais estranho e desconcertante do que imaginávamos. O que acontece nas entranhas do universo que explicariam esses fenômenos?

The Out-of-Body Travel Foundation's Marilynn Hughes on her NDE on WMAP with Capriana, Out of Body - https://outofbodytravel.org Out of Body Travel, Out of Body Experiences, Out of Body, Astral Travel, Astral Projection, Near Death Experiences, Mystical Experiences, OBE, OOBE, NDE, Marilynn Hughes, The Out-of-Body Travel Foundation

WMAP Radio with Capriana, Marilynn Hughes, Out of Body Travel , Out of Body Experiences - https://outofbodytravel.org Out of Body Travel, Out of Body Experiences, Out of Body, Astral Travel, Astral Projection, Near Death Experiences, Mystical Experiences, OBE, OOBE, NDE, Marilynn Hughes, The Out-of-Body Travel Foundation

WMAP Radio with Capriana, Marilynn Hughes, Out of Body Travel - https://outofbodytravel.org Out of Body Travel, Out of Body Experiences, Out of Body, Astral Travel, Astral Projection, Near Death Experiences, Mystical Experiences, OBE, OOBE, NDE, Marilynn Hughes, The Out-of-Body Travel Foundation

WMAP Radio with KC Armstrong and Marilynn Hughes, Out of Body Travel, Out of Body Experiences - https://outofbodytravel.org Out of Body Travel, Out of Body Experiences, Out of Body, Astral Travel, Astral Projection, Near Death Experiences, Mystical Experiences, OBE, OOBE, NDE, Marilynn Hughes, The Out-of-Body Travel Foundation

WMAP with KC Armstrong, Marilynn Hughes, Out of Body Travel, Out of Body Experiences - https://outofbodytravel.org Out of Body Travel, Out of Body Experiences, Out of Body, Astral Travel, Astral Projection, Near Death Experiences, Mystical Experiences, OBE, OOBE, NDE, Marilynn Hughes, The Out-of-Body Travel Foundation

WMAP with KC Armstrong, Capriana with Marilynn Hughes, Out of Body Travel, Out of Body Experiences - https://outofbodytravel.org Out of Body Travel, Out of Body Experiences, Out of Body, Astral Travel, Astral Projection, Near Death Experiences, Mystical Experiences, OBE, OOBE, NDE, Marilynn Hughes, The Out-of-Body Travel Foundation

WMAP Radio with KC Armstrong and Marilynn Hughes, Out of Body Travel, Out of Body Experiences - https://outofbodytravel.org Out of Body Travel, Out of Body Experiences, Out of Body, Astral Travel, Astral Projection, Near Death Experiences, Mystical Experiences, OBE, OOBE, NDE, Marilynn Hughes, The Out-of-Body Travel Foundation

Marilynn Hughes on WMAP KC Armstrong Comments, Out of Body Travel - https://outofbodytravel.org Out of Body Travel, Out of Body Experiences, Out of Body, Astral Travel, Astral Projection, Near Death Experiences, Mystical Experiences, OBE, OOBE, NDE, Marilynn Hughes, The Out-of-Body Travel Foundation

Das Universum hat einen kalten Fleck. Beziehungsweise eine Region, die kälter ist, als sie sein sollte. Was da abgeht und was das mit dem Urknall selbst zu tun hat, erfahrt ihr in der neuen Folge der Sternengeschichten: https://astrodicticum-simplex.at/?p=36793 Wer den Podcast finanziell unterstützen möchte, kann das hier tun: Mit PayPal (https://www.paypal.me/florianfreistetter), Patreon (https://www.patreon.com/sternengeschichten) oder Steady (https://steadyhq.com/sternengeschichten) Zur ausverkauften "Sternengeschichten Live"-Show gibt es am 29. März einen Zusatztermin: https://schwarzkaue-herten.de/veranstaltung/sternengeschichten-die-live-premiere-in-unserem-spiralarm-der-milchstrasse-2// Am 24. März gibt es auch in der Schwarzkaue Herten die Liveshow von Folge 100 vom Podcast "Das Universum": https://schwarzkaue-herten.de/veranstaltung/das-universum-wird-100-jubilaeums-gala-2/

Episódio sobre o que rolou no primeiro WMAP!

Stephen Crothers is a mathematician, physicist, and scholar of relativity who believes there are fundamental mistakes in the mathematics that have created an impenetrable confusion at the heart of physics for more than a hundred years. We talk to him about how errors in equations get propagated from mind to paper to pen, the ways in which relativity has created impossible features that defy explanation, and the curve-fitting crisis at LIGO and WMAP that undermines the foundational pillars of the Big Bang. Support the scientific revolution by joining our Patreon: https://bit.ly/3lcAasB Tell us what you think in the comments or on our Discord: https://discord.gg/MJzKT8CQub#mathematicalphysics #relativity #blackholefacts Check our short-films channel, @DemystifySci: https://www.youtube.com/c/DemystifyingScience AND our material science investigations of atomics, @MaterialAtomics https://www.youtube.com/@MaterialAtomics Join 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. - Blog: http://DemystifySci.com/blog - RSS: https://anchor.fm/s/2be66934/podcast/rss - Donate: https://bit.ly/3wkPqaD - Swag: https://bit.ly/2PXdC2y SOCIAL: - Discord: https://discord.gg/MJzKT8CQub - Facebook: https://www.facebook.com/groups/DemystifySci - Instagram: https://www.instagram.com/DemystifySci/ - Twitter: https://twitter.com/DemystifySci MUSIC: -Shilo Delay: https://g.co/kgs/oty671

Photo: No known restrictions on publication. WMAP 2010 @Batchelorshow 1/8: The Elephant in the Universe: Our Hundred-Year Search for Dark Matter Hardcover – May 31, 2022 by  Govert Schilling  (Author), Avi Loeb  (Foreword) https://www.amazon.com/Elephant-Universe-Hundred-Year-Search-Matter/dp/0674248996 In The Elephant in the Universe, Govert Schilling explores the fascinating history of the search for dark matter. Evidence for its existence comes from a wealth of astronomical observations. Theories and computer simulations of the evolution of the universe are also suggestive: they can be reconciled with astronomical measurements only if dark matter is a dominant component of nature. Physicists have devised huge, sensitive instruments to search for dark matter, which may be unlike anything else in the cosmos―some unknown elementary particle. Yet so far dark matter has escaped every experiment. Indeed, dark matter is so elusive that some scientists are beginning to suspect there might be something wrong with our theories about gravity or with the current paradigms of cosmology. Schilling interviews both believers and heretics and paints a colorful picture of the history and current status of dark matter research, with astronomers and physicists alike trying to make sense of theory and observation. Taking a holistic view of dark matter as a problem, an opportunity, and an example of science in action, The Elephant in the Universe is a vivid tale of scientists puzzling their way toward the true nature of the universe

John Mather is an astrophysicist at NASA who has been involved in important space missions to probe our fundamental understanding of the Universe for over four decades. He helped lead the design and deployment of the Cosmic Background Explorer Satellite (COBE), which launched in 1989 to probe the cosmic microwave background radiation from the Big Bang with a precision that could not be obtained from terrestrial experiments because of absorption of radiation by the atmosphere. The experiments on COBE, and its successor missions WMAP and PLANCK, literally have turned cosmology from an art to a science, allowing the precise measurement of cosmological observables that previously were either not measured at all or only measured to within a factor of two. This has led to a golden age of cosmology, where theories of the early universe can now be compared directly to observation. John directed the building of the Far Infrared Absolute Spectrophotometer (FIRAS) on COBE which was able to show that the cosmic microwave background radiation was indeed an almost perfect ‘black body’ spectrum associated with a very well defined temperature of the Universe at a time of about 300,000 years after the big bang. Indeed, no terrestrial experiment has ever produced such an accurate black body spectrum, which was one of the fundamental predictions that helped develop quantum mechanics early in the 20th century. For his work on COBE, John shared the Nobel Prize with George Smoot. But John didn’t rest on his laurels, for several decades after COBE John helped lead the design and development of the James Webb Space Telescope, which recently launched and will probe both the very early universe and also extra solar planets, possibly helping us discover evidence for life elsewhere in the Universe. John and I talked about his origins in science, the science he has accomplished, and what his future plans are in a discussion that will help provide a valuable perspective for anyone on the current status of cosmology and astrophysics, as well as what we might learn in the future. The ad-free video is available for all paid subscribers to Critical Mass in an adjoining post.. Video with ads will be available on the Podcast YouTube Channel, and audio is also available wherever you listen to podcasts. Enjoy! Get full access to Critical Mass at lawrencekrauss.substack.com/subscribe

Viele Raumfahrzeuge umkreisen leere Punkte im Weltall. Sie tun das mit Absicht und man kann sich schwer vorstellen, wie das funktionieren soll. Wie man das Nichts umkreisen kann, hört ihr in der neuen Folge der Sternengeschichten. Wer den Podcast finanziell unterstützen möchte, kann das hier tun: Mit PayPal (https://www.paypal.me/florianfreistetter), Patreon (https://www.patreon.com/sternengeschichten) oder Steady (https://steadyhq.com/sternengeschichten)

Lyman Alexander Page, Jr. is the James S. McDonnell Distinguished University Professor of Physics at Princeton University. He is an expert in observational cosmology and one of the original co-investigators for the WMAP probe that made precise observations of the cosmic background radiation, an electromagnetic echo of the Universe's Big Bang phase. Along with students and collaborators, Professor Lyman measures the spatial temperature variations in the cosmic microwave background (CMB). The CMB, which pervades the universe, is the thermal afterglow of the big bang. Detailed knowledge of the magnitude and pattern of the fluctuations in temperature from spot to spot on the sky, or anisotropy, help us understand how the universe evolved and how the observed structure, at sizes ranging from galaxies to superclusters of galaxies, were formed. From precise measurements of the CMB, one can also deduce many of the cosmological parameters and the physics of the very early universe. For example cosmologists have been able to determine the geometry and age of the universe, the cosmic density of baryons, the cosmic density of dark matter, and the Hubble parameter to percent-level accuracy. Lyman is the author of The Little Book of Cosmology, which provides a breathtaking look at our universe on the grandest scales imaginable. Written by one of the world's leading experimental cosmologists, this short but deeply insightful book describes what scientists are revealing through precise measurements of the faint thermal afterglow of the Big Bang―known as the cosmic microwave background, or CMB―and how their findings are transforming our view of the cosmos. Please join my mailing list; just click here http://briankeating.com/mailing_list.php

Na expectativa pelo lançamento do Telescópio Espacial James Webb, Elton Carvalho (@SnowRaptor), Felipe Andrade-Oliveira (@foliveira_astro) e Tupá Guerra (@tupaguerra) conversam com Thiago S. Gonçalves (@thiagosgbr) do Observatório do Valongo – UFRJ, sobre telescópios espaciais e sobre o que o próximo lançamento traz de especial. Lembramos do Hubble, do WMAP e do SOHO. Falamos da importância […]

Why is James Clerk Maxwell so dang awesome? How was he able to unify the forces of electricity and magnetism? Why was his work so revolutionary? I discuss these questions and more in today's Ask a Spaceman! Support the show: http://www.patreon.com/pmsutter All episodes: http://www.AskASpaceman.com Follow on Twitter: http://www.twitter.com/PaulMattSutter Like on Facebook: http://www.facebook.com/PaulMattSutter Watch on YouTube: http://www.youtube.com/PaulMSutter Read a book: http://www.pmsutter/book Keep those questions about space, science, astronomy, astrophysics, physics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE! Big thanks to my top Patreon supporters this month: David B, Frank T, Tim R, Alex P, Tom Van S, Mark R, Alan B, Craig B, Richard K, Steve P, Dave L, Chuck C, Stephen M, Maureen R, Stace J, Neil P, lothian53 , COTFM, Stephen S, Ken L, Debra S, Alberto M, Matt C, Ron S, Joe R, Jeremy K, David P, Norm Z, Ulfert B, Robert B, Fr. Bruce W, Nicolai B, Sean M, Edward K, Callan R, Darren W, Tracy F, Sarah K, Bill H, Steven S, Ryan L, Ella F, Richard S, Sam R, Thomas K, James C, Jorg D, R Larche, Syamkumar M, John S, Fred S, Homer V, Mark D, Brianna V, Colin B, Bruce A, Steven M, Brent B, Bill E, Tim Z, Thomas W, Linda C, Joshua, David W, Aissa F, Tom G, Marc H, Avery P, Scott M, Katelyn, Thomas H, Farshad A, Matthias S, Kenneth D, Maureen R, Michael W, Scott W, David W, Neuterdude, Cha0sKami, Brett, Robert C, and Matthew K! Thanks to Cathy Rinella for editing. Hosted by Paul M. Sutter, astrophysicist and the one and only Agent to the Stars (http://www.pmsutter.com). Video credits: NASA, ESA, Planck, WMAP, Illustris

Why is James Clerk Maxwell so dang awesome? How was he able to unify the forces of electricity and magnetism? Why was his work so revolutionary? I discuss these questions and more in today's Ask a Spaceman!   Support the show: http://www.patreon.com/pmsutter All episodes: http://www.AskASpaceman.com Follow on Twitter: http://www.twitter.com/PaulMattSutter Like on Facebook: http://www.facebook.com/PaulMattSutter Watch on YouTube: http://www.youtube.com/PaulMSutter Read a book: http://www.pmsutter/book Go on an adventure: http://www.AstroTours.co   Keep those questions about space, science, astronomy, astrophysics, physics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE! Big thanks to my top Patreon supporters this month: David B, Frank T, Tim R, Alex P, Tom Van S, Mark R, Alan B, Craig B, Richard K, Steve P, Dave L, Chuck C, Stephen M, Maureen R, Stace J, Neil P, lothian53 , COTFM, Stephen S, Ken L, Debra S, Alberto M, Matt C, Ron S, Joe R, Jeremy K, David P, Norm Z, Ulfert B, Robert B, Fr. Bruce W, Nicolai B, Sean M, Edward K, Callan R, Darren W, Tracy F, Sarah K, Bill H, Steven S, Ryan L, Ella F, Richard S, Sam R, Thomas K, James C, Jorg D, R Larche, Syamkumar M, John S, Fred S, Homer V, Mark D, Brianna V, Colin B, Bruce A, Steven M, Brent B, Bill E, Tim Z, Thomas W, Linda C, Joshua, David W, Aissa F, Tom G, Marc H, Avery P, Scott M, Katelyn, Thomas H, Farshad A, Matthias S, Kenneth D, Maureen R, Michael W, Scott W, David W, Neuterdude, Cha0sKami, Brett, Robert C, and Matthew K! Thanks to Cathy Rinella for editing. Hosted by Paul M. Sutter, astrophysicist and the one and only Agent to the Stars (http://www.pmsutter.com). Video credits: NASA, ESA, Planck, WMAP, Illustris   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.

Nesse episódio do Horizonte de Eventos vamos conversar sobre os 20 anos de uma das missões mais importantes para o nosso entendimento do universo, a missão WMAP que foi lançada para fazer o mapa mais preciso até então da chamada radiação cósmica de fundo. A missão WMAP revolucionou nossa visão do universo, ajudou a estabelecer os ingredientes do universo, ajudou a calcular a idade do universo de forma precisa, a definir a sua forma e respaldar a ideia da expansão acelerada do universo.

Jo Dunkley is a Professor of Physics and Astrophysical Sciences at Princeton University. ​Her research is in cosmology, studying the origins and evolution of the Universe. Her major projects are the Atacama Cosmology Telescope and the Simons Observatory. She's also a member of the Rubin Observatory's Dark Energy Science Collaboration. ​Professor Dunkley has been awarded the Maxwell Medal, the Rosalind Franklin award, and the New Horizons prize for her work on the Cosmic Microwave Background, and she shared the Gruber Prize and the Breakthrough Prize with the WMAP team. In her thrilling new guide to our Universe and how it works OUR UNIVERSE, Professor Dunkley reveals how it only becomes more beautiful and exciting the more we discover about it. With warmth and clarity, Dunkley takes us from the very basics - why the Earth orbits the Sun, and how our Moon works - right up to massive, strange phenomena like superclusters, quasars, and the geometry of spacetime. As she does so, Dunkley unfurls the history of humankind's heroic journey to understand the history and structure of the cosmos, revealing the extraordinary, little-known stories of astronomy pioneers including Williamina Fleming, Vera Rubin and Jocelyn Bell Burnell. Support our Sponsors LinkedIn Jobs! Use this link to post your first job ad for FREE LinkedIn.com/impossible biOptimizers for better sleep: https://magbreakthrough.com/impossible 00:00:00 Intro 00:01:50 How did you come up with the title and idea for the book? 00:03:23 About your collaboration on the book's illustrations. 00:07:06 Why do you use OUR in the title of book? Who is the book for? 00:08:45 What did you learn from writing this book? 00:11:02 What's the status of women in physics & astronomy? 00:16:10 What's your view on big bang cosmology and the origins of the Universe? 00:19:17 What's your view on big bang cosmology and the origins of the Universe? 00:24:09 Do we need new/better ideas in cosmology? 00:26:37 What is "adiabatic" as you discuss in your dissertation? 00:32:37 Where do quantum fluctuations come from and what do they evolve into? 00:37:29 Why is the Universe flat? 00:39:43 Is the existence of a primordial gravitational wave evidence for quantized gravity? 00:51:40 What seemed impossible to your younger self? Join this channel to get access to perks: https://www.youtube.com/channel/UCmXH_39/join Support the podcast: https://www.com/drbriankeating And please join my mailing list to get resources and enter giveaways to win a FREE copy of my book (and more) http://briankeating.com/mailing_list.php

有了WMAP提供坚实的数据支持，暴胀理论作为宇宙大爆炸理论的重要修正，一直统治宇宙学领域至今，被称之为标准宇宙模型。而当今宇宙学的最前沿领域就是在暴胀时刻，也就是大爆炸之后不可思议的十亿亿亿亿分之一秒的时间里发生的事情。

有了WMAP提供坚实的数据支持，暴胀理论作为宇宙大爆炸理论的重要修正，一直统治宇宙学领域至今，被称之为标准宇宙模型。而当今宇宙学的最前沿领域就是在暴胀时刻，也就是大爆炸之后不可思议的十亿亿亿亿分之一秒的时间里发生的事情。

有了WMAP提供坚实的数据支持，暴胀理论作为宇宙大爆炸理论的重要修正，一直统治宇宙学领域至今，被称之为标准宇宙模型。而当今宇宙学的最前沿领域就是在暴胀时刻，也就是大爆炸之后不可思议的十亿亿亿亿分之一秒的时间里发生的事情。

有了WMAP提供坚实的数据支持，暴胀理论作为宇宙大爆炸理论的重要修正，一直统治宇宙学领域至今，被称之为标准宇宙模型。而当今宇宙学的最前沿领域就是在暴胀时刻，也就是大爆炸之后不可思议的十亿亿亿亿分之一秒的时间里发生的事情。

How did so much junk get up in space? How can we clean it up? How is it making light pollution worse? I discuss these questions and more in today's Ask a Spaceman! Support the show: http://www.patreon.com/pmsutter All episodes: http://www.AskASpaceman.com Follow on Twitter: http://www.twitter.com/PaulMattSutter Like on Facebook: http://www.facebook.com/PaulMattSutter Watch on YouTube: http://www.youtube.com/PaulMSutter Read a book: http://www.pmsutter/book Keep those questions about space, science, astronomy, astrophysics, physics, and cosmology coming to #AskASpaceman for COMPLETE KNOWLEDGE OF TIME AND SPACE! Big thanks to my top Patreon supporters this month: Justin G, Matthew K, Chris L, Barbara K, Duncan M, Corey D, Justin Z, Neuterdude, Nate H, Andrew F, Naila, Aaron S, Scott M, Rob H, Lowell, David B, Frank T, Tim R, Alex P, Tom Van S, Mark R, Alan B, Craig B, Richard K, Steve P, Dave L, Chuck C, Stephen M, Maureen R, Stace J, Neil P, lothian53 , COTFM, Stephen S, Ken L, Debra S, Alberto M, Matt C, Ron S, Joe R, Jeremy K, David P, Norm Z, Ulfert B, Robert B, Fr. Bruce W, Catherine R, Nicolai B, Sean M, Edward K, Callan R, Darren W, JJ_Holy, Tracy F, Tom, Sarah K, Bill H, Steven S, Ryan L, Ella F, RDavid B, Frank T, Tim R, Alex P, Tom Van S, Mark R, Alan B, Craig B, Richard K, Steve P, Dave L, Chuck C, Stephen M, Maureen R, Stace J, Neil P, lothian53 , COTFM, Stephen S, Ken L, Debra S, Alberto M, Matt C, Ron S, Joe R, Jeremy K, David P, Norm Z, Ulfert B, Robert B, Fr. Bruce W, Catherine R, Nicolai B, Sean M, Edward K, Callan R, Darren W, JJ_Holy, Tracy F, Sarah K, Bill H, Steven S, Ryan L, Ella F, Richard S, Sam R, Thomas K, James C, Jorg D, R Larche, Syamkumar M, John S, Fred S, Homer V, Mark D, Brianna V, Colin B, Bruce A, Steven M, Brent B, Bill E, Tim Z, Thomas W, Linda C, Joshua, David W, Aissa F, Tom G, Marc H, Avery P, Scott M, Michael G, Katelyn, Thomas H, Farshad A, Matthias S, Kenneth D, Maureen R, and Michael W! Thanks to Cathy Rinella for editing. Hosted by Paul M. Sutter, astrophysicist and the one and only Agent to the Stars (http://www.pmsutter.com). Video credits: NASA, ESA, Planck, WMAP, Illustris

More than any other person, my Ph.D advisor Peter Timbie, taught me how to be a scientist. We discuss Peter's advisor David Wilkinson (namesake of the WMAP satellite) and Bob Dicke. Learn the history of the Cosmic Microwave Background told by one of best teachers in the Universe. Thanks to our sponsors! https://magbreakthrough.com/impossible http://betterhelp.com/impossible Learn more about your ad choices. Visit megaphone.fm/adchoices

How the WMAP satellite detected residual heat from the birth of the Universe. See acast.com/privacy for privacy and opt-out information.

How the WMAP satellite detected residual heat from the birth of the Universe. See acast.com/privacy for privacy and opt-out information.

DARK MATTER NEWS 11/16/2020 1) EXORCISMS in 2020? Yes, They are More frequent in US than ever (If you think the world needs an exorcism you are not alone. Brazil is a particular hot spot for exorcisms, sometimes featured on televised broadcasts of church services. Priests wave their hands over a person deemed to be possessed, shout orders for the devil to depart, then hold their hand to the person's forehead and push them backward, occasionally resulting in their collapse. San Francisco Archbishop Salvatore Cordileone says the exorcism prayers in Latin, remarking that “Latin tends to be more effective against the devil because he doesn't like the language of the church.” The prayers were different from those offered when a person is believed to be the subject of demonic possession. 2) You can see every planet in our solar system this week – CNN This week, there will be some not so familiar sights in the sky: Seven planets will be visible at various points in the day. Venus and Mercury are bright enough to see in the mornings, while Mars, Jupiter, Neptune and Saturn will be easier to see at night. You may have noticed the planets seen in the sky are always near the ecliptic, which means, in other words, the solar system is rather flat, with all its major parts moving in nearly the same plane. Why is the solar system flat? According to conventional science, the original cloud that became our solar system was spinning, and this spin caused it to flatten out into a disk shape. The sun and planets are believed to have formed out of this disk, which is why, today, the planets still orbit in a single plane around our sun. But an even bigger question; Is the universe flat? The exact shape is still a matter of debate in physical cosmology, but experimental data from various independent sources (WMAP, BOOMERanG, and Planck for example) confirm that the universe is flat with only a 0.4% margin of error. and finally 3) APOPHIS THE GOD OF CHAOS DIDN'T CANCEL THE ELECTION BUT WHAT IF IT COMES BACK? THIS QUESTION WAS ANSWERED BY SYFY.COM'S CASSIDY WARD: Credit: University of Hawaii THE ASTEROID APOPHIS ISN'T LIKELY TO HIT EARTH. BUT IF IT DID, WHAT COULD WE DO? @cassidyward https://www.syfy.com/syfywire/asteroid-impact-apophis-hit-earth-science In the very, very unlikely chance it did hit Earth, though, what could we do about it? PLANETARY DEFENSE The Center for Near-Earth Object Studies (CNEOS) at NASA's Jet Propulsion Laboratory tracks all known NEOs and their impact probabilities so we can act quickly if the need arises. Let's imagine, then, we draw the cosmic short straw and our new calculations put Apophis firmly in the "It's-Coming-For-A-Visit" category and we had years to prepare and prevent the impact, what could we do? The obvious and most sure answer for something like Apophis is to evacuate the area. An object of that size wouldn't threaten humanity on the whole but it would be devastating for a considerable portion of the planet. If we can't stop it or change its trajectory, we would need to get out of the way. An effort of that scale would require global cooperation as millions of individuals would become the first space-driven refugees. And depending on the asteroid's size, density, speed, and angle of approach, such an evacuation might not even be feasible. --- Send in a voice message: https://anchor.fm/darkmatterdigitalnetwork/message

1:

Cosmological parameters from SDSS and WMAP, The construction and operation of the brand new Vera C. Rubin observatory, and Quasars Prof. Michael Strauss is the chair of the Department of Astrophysical Sciences at Princeton University. He uses large-scale imaging and spectroscopic surveys of the sky to “map the universe”, with a particular focus on studying the large-scale distribution of galaxies to address questions in cosmology and galaxy properties and evolution. He is also particularly interested in quasars, powered by supermassive black holes in the centers of galaxies. --- Send in a voice message: https://anchor.fm/scientificsense/message Support this podcast: https://anchor.fm/scientificsense/support

A brief history of the universe and its possible death scenarios, WMAP, ACT, and WFIRST projects, inflation, dark energy, dark matter, and alternative theories, and artificial intelligence to aid cosmology and astrophysics. Prof. David Spergel is the director of the Center for Computational Astrophysics at Flatiron Institute and Emeritus Professor Princeton University. His research interests range from the search for planets around nearby stars to the shape of the universe. Using microwave background observations from the Wilkinson Microwave Anisotropy Probe (WMAP) and the Atacama Cosmology Telescope, he has measured the age, shape, and composition of the universe. He is currently co-chair of the Wide Field Infrared Survey Telescope (WFIRST) science team. WFIRST will study the nature of dark energy, complete the demographic survey of exoplanets, characterize the atmospheres of nearby planets and survey the universe with more than 100 times the field of view of the Hubble Space Telescope. --- Send in a voice message: https://anchor.fm/scientificsense/message Support this podcast: https://anchor.fm/scientificsense/support

Deb Morgan is a first-time author, advocate, and writer who shares her compelling story of endurance and overcoming. Ms. Morgan, after being a guest on WMAP was chosen as one of several contributing writers for the book titled Simply Amazing Women which releases May 2020. It is book two of the best-selling series Simply Amazing by Celebrity WMAP radio host, K. C. Armstrong, a former favorite from the Howard Stern Show. The book is now available on Amazon, Barnes & Noble, and many fine bookstores online. https://selfdiscoverymedia.com/2020/05/25/c20-22-deb-morgan-with-simply-amazing-women/

"How did marriage get here and what's married supposed to look like? Well, Jesus makes it clear in this passage that God invented marriage and he invented it to be with one man and one woman who would live together forever. One man, one woman together forever." Family Discussions: What does 'from the beginning of creation' mean in terms of Genesis 1? Why is it so important to our understanding of the Christian faith and the institution of marriage? If you're putting a price tag on that name that's written on your heart, or if you're married to the name that's already there, what would it be? What would the price tag of your marriage be and what would it be worth to you to protect it? Transcription: 00:13          Do you know that just a few years ago, NASA sent up a satellite called the WMAP satellite and it begin to film the creation. They took this incredible hundred billion galaxy cosmos of ours and they put it in their computers and they ran it back and they saw that it all came from zero. Imagine 100 billion galaxies coming from absolute nothing. We believe that God spoke and a hundred billion galaxies came flying out of their mouth. And you know what? NASA has proved it in that same computer rendition of the creation. They saw that as 100 billion galaxy cosmos traveled, get this, over a billion light years. I mean defying every known law of physics and science by light years. It said that we traveled as a cosmos over a billion light years in the first trillionth of a second. Listen to what Jesus says in Mark chapter 10:6. I mean, scripture is so scientifically on target, "but Jesus said to them, because of the hardness of your heart, he wrote you this commandment that from the beginning of creation, God made Adam and Eve, male and female from the beginning of creation, God made them male and female. For this reason, a man shall leave his father and mother and cling to his wife and the two shall become one flesh." There are no longer two but one flesh.   01:46          A few years ago, RadioShack had this commercial that says, "You've got questions. We got answers." And you know what? RadioShack has a lot of answers, but I think scripture pretty much claims that truth. When you have questions, they're here. How did we get here? When did man originate? How long have we been around? Where did it all come from? What is marriage and what's marriage supposed to look like? You got questions, he's got answers. How long has man been here? Well, according to Jesus, man has been on the earth since the beginning of creation. That's Genesis chapter one. How did man get here? Well, if you look as Darwin did at the human eye, even Darwin himself in his book, 'The Origin of Species', he said to suppose that the eye, with all of its inevitable contrivances for adjusting focus at various distances for admitting various amounts of life and for the correction of sphere and chromatic aberrations is the product of evolution. Seems I freely confessed absurd in the highest degree. Even Darwin himself admitted that evolution in terms of human vision is absolutely absurd.   02:59          And how did marriage get here and what's married supposed to look like? Well, Jesus makes it clear in this passage that God invented marriage and he invented it to be with one man and one woman who would live together forever. One man, one woman together forever. You know, people say, well, if you're in love, sex is okay or if you, you know, if you think you're going to get married sex is okay, or in any, you know, orientations, sex is okay. When scripture is clear that God wants that that very special relationship between a man and a woman to be designed for marriage and for marriage alone. To last, I watched my daddy and my mama love each other for 66 years and I saw him literally die. My daddy died in my mother's arms and at the end of my daddy's life he was still honoring the wedding ring and even wearing for all those years. So, if you've got questions, he's got answers.   03:56          Here's a couple of questions to think about today. What does 'from the beginning of creation' mean in terms of Genesis 1. In the creation account, when Jesus said for the beginning of creation, God made Adam and Eve, male and female. And question two is why is Genesis 1, the creation account of Genesis, why is it so important to our understanding of the Christian faith and the institution of marriage? And then the third question, if you're putting a price tag on your marriage, either one you already have or your future marriage, as I told my sons they had a girl's name written on their heart and someday that name of that incredible woman would show up. But if you're putting a price tag on that name that's written on your heart, or if you're married to the name that's already there, what would it be? What was the, what would the price tag of your marriage be and what would it be worth to you to protect it? And here's the thought for the day. Only a creative God could build something as valuable and worth protecting as a godly marriage relationship. Be careful!

Year end episode with Kellie Koch from the Being There Podcast and WMAP Radio. Episode contents are as follows -Kellie's intro with Being There podcast and WMAP backgrounds -Boulton Center movie schedule for 2019 -Sam praises Shudder subscription and the movie "You Might Be The Killer" -23:00 Top 5 Movie villains -49:00 Top 5 TV shows of 2018 1:18:00- Top 5 Movies of 2018 1:39:45- Top 10 Albums of 2018 Its been another killer year of doing this show. Hope you enjoy the episode. please share and tell a friend that may enjoy this show. Also rate and review on ITUNES. Thanks

Deuxième volet du meilleur des trois saisons de WMAP! Playlist : Protect And Serve > UGK Super Tight, 1994 /…

La fin de la saison approche et d’ici à ce que l’antenne soit rendue, j’ai sélectionné le meilleur de WMAP!…

The only things in life we can control are our thoughts, feelings, and behaviors. Understanding and managing our thoughts, feelings, and behaviors is thus the most important thing we can do to have a truly successful life. In this interview, Dr. Gleb Tsipursky discusses the importance of understanding and managing our mind in order to get what we want out of life.Please express your thoughts on the podcast through leaving comments, clicking Like if you like it, and if you do like it, Follow us!The podcast was brought to you by Intentional Insights, a nonprofit organization that popularizes science-based strategies to help people make wise decisions and reach their goals, with the aim of building an altruistic and flourishing world (www.intentionalinsights.org).Sign up for our newsletter here: http://intentionalinsights.org/newsletterDonate to support our work here: http://intentionalinsights.org/view/donate

Exit le Midwest! C’est du côté de Los Angeles que WMAP s’installe aujourd’hui, à la rencontre des 5th Dimension !…

C’est la fin de saison et WMAP s’arrête à Sète en compagnie de Demi Portion. Bonnes vacances à toutes et…

  Pour ce numéro, c’est l’album Russian Roulette d’Alchemist qui passe sous la sonde WMAP ! P.S: Je vous laisse…

The Big bang. How do we know it happened? How do we know what happened?Dr. Michael Zemcov and Dr. Katie Mack and I talk to the clever hosts of Encyclopedia Brunch. It's Tim Dobbs and Kathryn Cogert! WHAT FUN!

Das kosmologische Prinzip der Homogenität und statistischen Isotropie des Raumes ist eine fundamentale Annahme der modernen Kosmologie. Auf dieser Basis wird die Existenz einer inflationären Phase im jungen Universum postuliert, welche wiederum primordiale Gaußverteilte Fluktuationen vorhersagt, welche sich im kosmischen Mikrowellenhintergrund als Temperatur- und Polarisationsanisotropien manifestieren. Die Grundidee meiner Arbeit war die Weiterentwicklung einer modellunabhängigen Untersuchungsmethode, welche die Gauß’sche Hypothese für die Dichtefluktuationen testet, wobei die Gaußianität eines Ensembles mit der Zufallsverteilung der Fourier Phasen im Phasenraum definiert wird. Die Methode basiert auf einer nichtlinearen Datenanalyse mit Hilfe von Surrogatkarten, welche die linearen Eigenschaften eines Datensatzes imitieren. Im Rahmen der Surrogatmethode habe ich unter Verwendung zweier verschiedener Bildanalyseverfahren, nämlich den Minkowski Funktionalen und den Skalierungsindizes, beide sensitiv auf Korrelationen höherer Ordnung, Karten der kosmischen Mikrowellenhintergrundstrahlung des WMAP und des Planck Experimentes auf skalenabhängige Phasenkorrelationen untersucht. Ein Schwerpunkt lag hierbei auf Studien zu hemisphärischen Asymmetrien und zum Einfluss der galaktischen Ebene auf die Resultate. Aus der Analyse der Phasenkorrelationen im Phasenraum entwickelte ich neue Methoden zur Untersuchung von Korrelationen zwischen Statistiken höherer Ordnung im Ortsraum und den Informationen des Phasenraumes. Beide Bildanalyseverfahren detektierten Phasenkorrelationen auf den größten Skalen des kosmischen Mikrowellenhintergrundes in vergleichbarer Ausprägung. Der Einfluss der galaktischen Ebene auf diese Resultate zeigte sich in Cutsky Analysen und beim Vergleichen verschiedener Vordergrundsubtraktionsverfahren innerhalb der zwei Experimente als vernachlässigbar gering. Hemisphärische Anomalien auf den größten Skalen der Hintergrundstrahlung wurden wiederholt bestätigt. Die Parametrisierung von Nicht-Gaußianität durch den fNL-Parameter zeigte sich beim Vergleich von fNL-Simulationen mit experimentellen Daten als unzureichend. In Analysen der Daten mit Hilfe von Bianchi-Modellen zeigten sich Hinweise auf eine nicht-triviale Topologie des Universums. Die Resultate meiner Arbeit deuten auf eine Verletzung des standardmäßigen Single Field Slow-Roll Modells für Inflation hin, und widersprechen den Vorhersagen von isotropen Kosmologien. Meine Studien eröffnen im Allgemeinen neue Wege zu einem besseren Verständnis von Nicht-Gauß'schen Signaturen in komplexen räumlichen Strukturen, insbesondere durch die Analyse von Korrelationen der Fourier-Phasen und deren Einfluss auf Statistiken höherer Ordnung im Ortsraum. In naher Zukunft können die Polarisationsdaten des Planck Experimentes weiteren Aufschluss über die Anomalien der kosmischen Mikrowellenhintergrundstrahlung bringen. Die Beschreibung des polarisierten Mikrowellenhintergrundes innerhalb einer Phasenanalyse wäre eine wichtige Ergänzung zu klassischen Studien.

You might have seen: NASA, WMAP PRODUCES NEW RESULTS, Mar 26, 2013; http://map.gsfc.nasa.gov/news/

One of the key challenges in Cosmology today is to probe both statistical isotropy and Gaussianity of the primordial density perturbations, which are imprinted in the cosmic microwave background (CMB) radiation. While single-field slow-roll inflation predicts the CMB to fulfil these two characteristics, more complex models may give rise to anisotropy and/or non-Gaussianity. A detection or non-detection allows therefore to discriminate between different models of inflation and significantly improves the understanding of basic conditions of the very early Universe. In this work, a detailed CMB non-Gaussianity and isotropy analysis of the five- and seven-year observations of the WMAP satellite is presented. On the one hand, these investigations are performed by comparing the data set with simulations, which is the usual approach for this kind of analyses. On the other hand, a new model-independent approach is developed and applied in this work. Starting from the random phase hypothesis, so- called surrogate maps are created by shuffling the Fourier phases of the original maps for a chosen scale interval. Any disagreement between the data and these surrogates points towards phase correlations in the original map, and therefore – if systematics and foregrounds can be ruled out – towards a violation of single-field slow roll inflation. The construction of surrogate maps only works for an orthonormal set of Fourier functions on the sphere, which is provided by the spherical harmonics exclusively on a complete sky. For this reason, the surrogate approach is for the first time combined with a transformation of the full sky spherical harmonics to a cut sky version. Both the single surrogate approach as well as the combination with the cut sky transformation are tested thoroughly to assess and then rule out the effects of systematics. Thus, this work not only represents a detailed CMB analysis, but also provides a completely new method to test for scale- dependent higher order correlations in complete or partial spherical data sets, which can be applied in different fields of research. In detail, the applications of the above methods involve the following analyses: First, a detailed study of several frequency bands of the WMAP five-year data release is accomplished by means of a scaling index analysis, whereby the data are compared to simulations. Special attention is paid to anomalous local features, and ways to overcome the problem of boundary effects when excluding foreground-influenced parts of the sky. After this, the surrogate approach is for the first time applied to real CMB data sets. In doing so, several foreground-reduced full sky maps from both the five- and seven-year WMAP observations are used. The analysis includes different scale intervals and a huge amount of checks on possible systematics. Then, another step forward is taken by applying the surrogate approach for the first time to incomplete data sets, again from the WMAP five- and seven-year releases. The Galactic Plane, which is responsible for the largest amount of foreground contribution, is removed by means of several cuts of different sizes. In addition, different techniques for the basis transformation are used. In all of these investigations, remarkable non-Gaussianities and deviations from statistical isotropy are identified. In fact, the surrogate approach shows by far the most significant detection of non-Gaussianity to date. The band-wise analysis shows consistent results for all frequency bands. Despite a thorough search, no candidate for foreground or systematic influences could be found. Therefore, the findings of these analyses have so far to be taken as cosmological, and point on the one hand towards a strong violation of single-field slow-roll inflation, and question on the other hand the concept of statistical isotropy in general. Future analyses of the more precise measurements of the forthcoming PLANCK satellite will yield more information about the origin of the detected anomalies.

Reasons for the expansion of the universe are addressed at the start of this lecture, focusing especially on the acceleration of dark energy. Supernovae were the first evidence for the existence of dark energy. Two other proofs are presented. The first is the Cosmic Microwave Background, which is a form of electromagnetic radiation that is perfectly smooth and equal in all directions. It firmly supports the Big Bang theory. Projects attempting to measure it, such as COBE and WMAP, are discussed. Secondly, Large-Scale Clustering is introduced: by measuring the degree of clustering, astronomers hope to advance their understanding of dark energy and dark matter. Computer simulations of the evolution of the universe are shown.

How did the Universe begin? What made it expand from the size of a grapefruit to billions of lightyears across in a fraction of a second after the Big Bang? And why did it stop? And is ours the only Universe? We ask cosmologists Hiranya Peiris and Matt Johnson.

Transcript: The most sensitive test of the curvature of space uses the cosmic microwave background radiation. These microwaves were released three hundred thousand years after the big bang. The fluctuations in the microwave background were imprinted with a certain angular size, and depending on the shape of the universe, the fluctuations are either magnified or demagnified as they travel through billions of lightyears of space and billions of years of time to reach us. The universe therefore can act as an enormous lens. Careful observations of the fluctuations with NASA’s WMAP satellite shows that there is no space curvature. There is no magnification or demagnification of the fluctuations traveling through vast amounts of cosmic time. The universe therefore is very close to being flat.

Transcript: Tracing the expansion rate back in time gives the age of the universe in a big bang model. Cosmological parameters, when they’re measured, can be used to predict the age of the universe. Based on the accurate measurements of the WMAP satellite, the age of the universe is between eleven and twelve billion years. Note that any universe where there is vacuum energy and a cosmological constant has an older age than a universe without such vacuum energy because the cosmological constant acts to accelerate the expansion and give an older age. The fundamental test of the big bang model is to look for the oldest objects where the age is measured using an astrophysical technique. In astronomy we use globular clusters, the oldest known stellar systems in the Milky Way galaxy. Their ages are measured by comparison of theories of stellar evolution with observations of the globular cluster. This technique is called isochrone fitting. These careful observations and the theories of stars that go with them show that the oldest globular clusters in the Milky Way galaxy have ages of about ten to eleven billion years allowing enough time for them to have formed along with the Milky Way. Thus, the big bang passes a critical test; it contains no objects older than the universe itself.

What would an extrasolar observer see of our solar system? We find out in this month's Naked Astronomy as well as explore the events that led to climate change on a cosmic scale. Plus, news of an asteroid flyby, surfing Venus' atmosphere and the end of the WMAP. We take on your space science questions, including the best place to site a space elevator! Like this podcast? Please help us by supporting the Naked Scientists

What would an extrasolar observer see of our solar system? We find out in this month's Naked Astronomy as well as explore the events that led to climate change on a cosmic scale. Plus, news of an asteroid flyby, surfing Venus' atmosphere and the end of the WMAP. We take on your space science questions, including the best place to site a space elevator! Like this podcast? Please help us by supporting the Naked Scientists

Measurements of the Cosmic Microwave Background (CMB) emission with increasingly high resolution and sensitivity are now becoming available, and even higher quality data are expected from the ongoing Planck mission and future experiments. Dealing with the Galactic foreground contamination, however, is still problematic, due to our poor knowledge of the physics of the Interstellar Medium at microwave frequencies. This contamination biases the CMB observations and needs to be removed before using the data for cosmological studies. In this thesis the problem of component separation for the CMB is considered and a highly focused study of a specific implementation of Independent Component Analysis (ICA), called FastICA, is presented. This algorithm has been used to perform a foreground analysis of the WMAP three and five-year data and subsequently to investigate the properties of the main sources of diffuse Galactic emission (e.g. synchrotron, dust and free-free emission). The foreground contamination in the WMAP data is quantified in terms of coupling coefficients between the data and various templates, which are observations of the sky emission at frequencies where only one physical component is likely to dominate. The coefficients have been used to extract the frequency spectra of the Galactic components, with particular attention paid to the free-free frequency spectrum. Our results favour the existence of a spectral ‘bump’, interpreted as a signature of emission by spinning dust grains in the Warm Ionised Medium, which spatially correlates with the Hα radiation used to trace the free-free emission. The same coupling coefficients have been used to clean the WMAP observations, which have then been further analysed using FastICA. This iterative step in the analysis provides a powerful tool for cleaning the CMB data of any residuals not traced by the adopted templates. In practice, it is a unique way to potentially reveal new physical emission components. In this way, we detected a residual spatially concentrated emission component around the Galactic center, consistent with the so-called WMAP Haze. In order to take into account the actual spatial properties of the Galactic foreground emission, we proposed an analysis of theWMAP data on patches of the sky, both using FastICA and the Internal Linear Combination (ILC). Since the temperature power spectrum is reasonably insensitive to the fine details of the foreground corrections except on the largest scales (low l), the two methods are compared by means of non-Gaussianity tests, used to trace the presence of possible residuals. While the performance of FastICA improves only for particular cases with a small number of regions, the ILC CMB estimation generally ameliorates significantly if the number of patches is increased. Moreover, FastICA plays a key role in establishing a partitioning that realistically traces the features of the sky, a requirement we have shown to be paramount for a successful regional analysis.

The cosmic microwave background (CMB) provides us with a wealth of information about the properties of our Universe. In this PhD work, we develop and apply new techniques for studying fundamental problems of cosmology using the CMB. Dark energy, if it exists, leaves a characteristic imprint in the CMB temperature fluctuations, the so-called integrated Sachs-Wolfe (ISW) effect. This small effect can be detected via its cross-correlation with the large-scale structure (LSS). We derive an optimal method for ISW detection using temperature and polarization data of the CMB which differs from that usually used in two fundamental ways: we keep the LSS distribution and a part of the primordial temperature fluctuations fixed, rather than averaging over different realisations as done in the standard method. For an ideal scenario, we obtain an overall enhancement of the detection significance of 23 per cent. For polarization data from the Planck Surveyor mission, this enhancement will be at least 10 per cent, where the limiting factor will be the contamination by Galactic foregrounds. The CMB is observed to be almost perfectly isotropic, which is considered strong evidence for the isotropy of the Universe. However, some anomalies have been found in the temperature map of the Wilkinson Microwave Anisotropy Probe (WMAP), which seem to question the statistical isotropy of the temperature fluctuations. In order to understand whether these are due to chance fluctuations or to a preferred direction intrinsic to the geometry of the primordial Universe, we compute the part of the WMAP polarization map which is uncorrelated with the temperature map, and use it as a statistically independent probe of the so-called axis of evil. The latter is an unusual alignment between the preferred directions of the quadrupole and the octopole in the temperature map. We find that the axis of the quadrupole of the uncorrelated polarization map aligns with the axis of evil, whereas the axis of the octopole does not. However, due to the high noise-level in the WMAP polarization map, we have an uncertainty of about 45 deg in our axes. With this uncertainty, the probability of at least one axis aligning by chance in an isotropic Universe is around 50 per cent. We therefore do not obtain evidence for or against a preferred direction intrinsic to the primordial Universe. For Planck, we expect the uncertainty in the axes to go down to 10-20 deg, again depending on how well the foregrounds can be removed from the map. Our technique applied to Planck data will thus serve as a powerful means to understand the origin of the CMB anomalies. Instead of studying particular features in the CMB maps as described above, we can also use the CMB to constrain several cosmological parameters simultaneously by sampling the parameter space. The parameter constraints obtained by WMAP marked the beginning of precision cosmology and were the biggest success of the mission. In such parameter sampling studies, the main bottleneck is usually the evaluation of the likelihood. We have thus implemented a sparse-grids based interpolation of the WMAP likelihood surface as a shortcut for the likelihood evaluation. This is orders of magnitude faster to compute than the original likelihood. Our method is a competitive alternative to other approaches for speeding up parameter sampling.

Reasons for the expansion of the universe are addressed at the start of this lecture, focusing especially on the acceleration of dark energy. Supernovae were the first evidence for the existence of dark energy. Two other proofs are presented. The first is the Cosmic Microwave Background, which is a form of electromagnetic radiation that is perfectly smooth and equal in all directions. It firmly supports the Big Bang theory. Projects attempting to measure it, such as COBE and WMAP, are discussed. Secondly, Large-Scale Clustering is introduced: by measuring the degree of clustering, astronomers hope to advance their understanding of dark energy and dark matter. Computer simulations of the evolution of the universe are shown.

Καθ' οδόν προς την αποφοίτηση, ένα podcast για τα αμερικάνικα ρεάλιτι, το iPhone 2.0, αλλά και γιατί δεν μπορεί να υπάρξει τηλεκίνηση.Download MP3: Episode 14 (56:26, 78MB)Podcast feed: click hereComments: timaras@gmail.comShownotesCover Art: Seaworld, San Diego, CANews:- Η επιτυχία του American Idol- The Moment of Truth (bonus video)- Online backup: Microsoft Skydrive- H ηλικία του σύμπαντος είναι 13.73 δις χρόνια!- Οι τιμές των Blu ray players αυξήθηκαν $100Σχόλια:- Το iPhone 2.0: η γέννηση μιας νέας πλατφόρμας- Lost: Νέο Multi-author blog για το Lost: The Losties! Οι εγγραφές άρχισαν.Φυσική:- Τι παίζει με την τηλεκίνηση? Μερικές αποδείξεις γιατί δεν μπορεί να υπάρξει (τρέμε Uri Geller!)Music:- Φινάλε: Mozart, Symphony 40, no.1

Recent measurements of the Cosmic Microwave Background (CMB) have allowed the most accurate determinations yet of the parameters of the standard CDM model, but the data also contain intriguing anomalies that are inconsistent with the assumptions of statistical isotropy and Gaussianity. This work investigates possible sources of such anomalies by studying the morphology of the CMB. An unexpected correlation is found between the CMB anisotropies and a temperature pattern generated in a Bianchi Type VIIh universe, i.e., an anisotropic universe allowing a universal rotation or vorticity. This model is found to be incompatible with other observations of the cosmological parameters, but correcting for such a component can serendipitously remove many of the anomalies from the WMAP sky. This result indicates that an alternative cosmological model producing such a morphology may be needed. A similar cross-correlation method applied to the microwave foregrounds studies the variation of the spectral behaviours of the Galactic emission processes across the sky. The results shed light on the unexpectedly low free-free emission amplitude as well as the nature of the anomalous dust-correlated emission that dominates at low frequencies. As a complementary method, phase statistics apply to situations where no a priori knowledge of the spatial structure informs the search for a non-Gaussian signal. Such statistics are applied to compact topological models as well as to foreground residuals, and a preliminary analysis shows that these may prove powerful tools in the study of non-Gaussianity and anisotropy.

At the start of the month ESA's SMART-1 spacecraft plunged into the Moon. We caught up with one of the mission scientists to find out just what the SMART-1 mission's aims were and why it crashed. We also find out about the beginnings of the Universe and how the NASA spacecraft WMAP has helped shed some light on the first 300,000 years. The latest astronomy news includes the naming of 2003UB313, the launch of Solar-B (Hinode) to study the Sun and the latest news from the Mars Rovers and Mars Express. We also find out what you can see in the night sky and Nick gets Tim O'Brien to answer questions about coordinates and viewing the sky.

At the start of the month ESA's SMART-1 spacecraft plunged into the Moon. We caught up with one of the mission scientists to find out just what the SMART-1 mission's aims were and why it crashed. We also find out about the beginnings of the Universe and how the NASA spacecraft WMAP has helped shed some light on the first 300,000 years. The latest astronomy news includes the naming of 2003UB313, the launch of Solar-B (Hinode) to study the Sun and the latest news from the Mars Rovers and Mars Express. We also find out what you can see in the night sky and Nick gets Tim O'Brien to answer questions about coordinates and viewing the sky.

WMAP Space probes give big bang for the buck, and the rise and rise of Hepatitus-C . Presented by Jacqui Pfeffer, News by Chris Stewart, Matt Francis talks WMAP, Tilly Boleyn documents Hepatitus-C, Produced by Matt Clarke

WMAP Space probes give big bang for the buck, and the rise and rise of Hepatitus-C . Presented by Jacqui Pfeffer, News by Chris Stewart, Matt Francis talks WMAP, Tilly Boleyn documents Hepatitus-C, Produced by Matt Clarke

WMAP Space probes give big bang for the buck, and the rise and rise of Hepatitus-C . Presented by Jacqui Pfeffer, News by Chris Stewart, Matt Francis talks WMAP, Tilly Boleyn documents Hepatitus-C, Produced by Matt Clarke

Studying the cosmic microwave background (CMB) has proven to be an immensely rich source of information about the Universe we live in. Many groups were and are intensely working on the interpretation of the large amount of CMB data, which has become available during the last decades and will be obtained with many new projects already observing at present or planned for the near future. The observations by COBE in the 90's have shown that the CMB is extremely uniform, with angular fluctuations of the temperature on the level of one part in 10^5 on angular scales larger than 7 degree. On the other hand on these scales no deviations of the CMB energy spectrum from a perfect blackbody were found. But today we do know that there exist spectral distortions of the CMB on arcminute scales due to the scattering of CMB photons off the hot electrons residing inside the deep potential well of clusters of galaxies, which leads to the so called thermal-SZ effect (th-SZ). The th-SZ effect has already been measured for several big cluster and within the next 5 years, many CMB experiments like ACBAR, SZA, PLANCK, SPT, ACT, APEX, AMI and QUIET will perform deep searches for clusters with very high sensitivity. Many tens of thousands of clusters will be detected allowing us to carry out detailed studies of cluster physics and to place constraints on parameters of the Universe. Due to this great advance in technology one can expect that small deviations from the main SZ cluster signal, e.g. related to relativistic corrections to Compton scattering for high electron temperature, will become observable. Motivated by this promising perspective here we studied the influence of the motion of the Solar System with respect to the CMB rest frame on the SZ cluster signature. This kind of contribution to the SZ signal has been neglected in the literature so far, but as we show here it is of the same order as other corrections under discussion. We found that this motion-induced SZ signal has a very strong spectral and spatial dependence and due to the great knowledge about the motion-induced CMB dipole it can be predicted with high precision, which makes it easy to account for it in the analysis of future SZ studies. Here one big problem naturally arises: any experiment trying to observe tiny frequency-dependent signals needs a cross calibration of the different frequency channels. Several different standard methods for calibration issues are known, e.g. based on the annual modulation of the CMB dipole, the microwave flux from planets like Jupiter or the comparison with CMB sky maps obtained by well calibrated experiments like WMAP, each with their own problems and drawbacks. However the achieved level of cross calibration is limited by the knowledge of the calibrator. Today scientists are already speaking about extremely small frequency-dependent features in the CMB temperature power spectrum resulting from the scattering of CMB photons in the fine structure lines of different atomic species during the dark ages. Obtaining these signals can in principle be used to answer some of the interesting questions about the history of chemical enrichment and reionization, but it is likely that the necessary level of cross calibration cannot be reached with the standard methods. In this context we considered the fact that the superposition of blackbodies with different temperatures is not again a blackbody. We show that in the limit of small temperature difference the superposition leads to a y-type spectral distortion. This kind of distortion arises whenever one in observing the CMB sky with finite angular resolution. We discuss the spectral distortions due to the primordial CMB temperature fluctuations and the motion-induced CMB dipole. Furthermore we considered possible applications for calibration issues. We show that within this context also clusters of galaxies, especially for experiments observing only small parts of the sky, in the future may become standard sources for calibration issues. Although the observations with COBE/FIRAS have proven that the CMB energy spectrum on large angular scales is extremely close to a pure blackbody one may still expect some deviations due to processes like the damping of acoustic waves, turbulent motion of the matter, the decay of unstable particles or annihilation of matter in the early Universe. Especially possible distortions from very early epochs (redshifts z> few x 10^5) lead to deviations of the CMB brightness temperature at frequencies (1-few x 10 GHz) well below the range of COBE/FIRAS. Currently people in the USA and especially at the NASA Goddard Space Flight Center are intensely working on experiments to measure the CMB temperature at these frequencies, where the largest distortions could be expected. One can therefore hope that in the near future also new constraints on the CMB energy spectrum will become available. Therefore in this thesis we also reexamined the thermalization of spectral distortions of the CMB in the early Universe. Due to the large entropy here one of the most important processes is the production of low frequency photons by double Compton scattering. Until now people were only using a description of this emission in the limit of cold electrons and soft initial photons, but especially for the thermalization of large distortions at very high redshifts (z > 10^6) the inclusion of relativistic corrections to the main processes at work may become necessary. Here we provide two steps towards a solution of this problem. First we discuss in detail the full kinetic equation for the time evolution of the photon field under double Compton scattering in a hot, isotropic thermal plasma, both numerically and analytically. We obtained accurate approximations for the effective double Compton Gaunt factor, which are applicable in a very broad range of physical situations. We then provide a reformulation of the thermalization problem with respect to relativistic corrections and discuss its solution in the limit of small chemical potential distortions at high redshifts. Our results indicate that due to relativistic corrections the thermalization at high redshifts slows down notably and therefore makes the CMB more vulnerable for distortions at epochs z > 10^6. Here we also report some of our attempts to solve the full problem numerically.