The 365 Days of Astronomy, the daily podcast of the International Year of Astronomy 2009

Hosted by: Dr. Pamela L. Gay (@CosmoQuest) From February 20, 2020. In today's episode we look at a variety of new results related to observing how planetary systems form, where planet ends up in solar system's (including in our own Jupiter's atmosphere!), and how rocks get flung at Earth even today.   Ice volcanoes videos etc.: https://www.youtube.com/shorts/X3x9mOkN240 https://www.youtube.com/watch?v=HB27iJtxZrA https://www.thehotelsaugatuck.com/blog/ice-volcanoes-and-ice-balls-oval-beach   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.

Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes. actualastronomy@gmail.com (Times in Eastern) - Oct 1: Moon at perigee; Beta Cephei colorful double star - Oct 2: Venus stationary; 41 Aquarii colorful double star; R Fornacis carbon star - Oct 3: Last Quarter Moon (9:25); Gegenschein high in S at midnight; 3 Cephei colorful double star - Oct 4: Saturn at opposition; Lunar Curtis X; Sirius unaided in daylight; Jupiter double shadow transit (12:49 AM); M30 well placed - Oct 5: Mars occulted by Moon (NW Canada); Mercury 5° N of Venus; Jupiter double shadow transit (7:03 PM); Europa & Callisto shadow double feature (3:24 AM); M2 & NGC 7009 well placed - Oct 6: Jupiter occulted by Moon (4:33 AM);  Pallas at opposition; 161P/Hartley-IRAS well placed - Oct 7: NGC 7293 (Helix Nebula) well placed - Oct 8: Zodiacal Light in E; M15 well placed - Oct 9: NGC 7331 well placed - Oct 10: New Moon (11:50); S Taurid meteors peak; Stephan's Quintet well placed;  - Oct 11: Spot Vega unaided? Jupiter double shadow transit (2:42 AM); NGC 7023 well placed - Oct 12: Mercury greatest eastern elongation; Mercury near Moon; Jupiter double shadow transit (9:11 PM); NGC 40 well placed - Oct 13: Vesta at opposition; Spot Vesta unaided; M42 well placed - Oct 14: Antares near Moon - Oct 16: Moon at apogee - Oct 17: Hipparchus Ray (7:45 PM) - Oct 18: First Quarter Moon (12:13); Lunar X near Werner; Jupiter double shadow transits (4:42 AM & 7:07 AM); Maginus sunrise ray (7:00 PM) - Oct 19: Lunar Straight Wall - Oct 20: Jupiter double shadow transit (12:24 AM); 94 Aquarii colorful double star - Oct 21: Orionid meteors peak (ZHR=20); Jupiter double shadow transit (5:59 PM); WZ Cas colorful double star; R Leo max - Oct 23: Venus in inferior conjunction; Crater Baily (9:00 PM) - Oct 24: Mercury stationary; Crater Baily (9:00 PM); Tycho Brahe died (1601) - Oct 25: Full Moon; Jupiter double shadow transit (7:18 AM) - Oct 26: Mare Orientale (9:00 PM) - Oct 28: Moon at perigee; Jupiter double shadow transit (8:35 PM) - Oct 31: Halloween; X Cnc carbon star in pre-dawn; Z Psc carbon star in evening   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.

September Part 2. Dustin Ruoff (!!!) and Dr. Jenifer "Dr. Dust" Millard host.  Damien Phillips, John Wildridge and Dustin Ruoff produce. Live from AstroCamp! It's Chatty McChatty time again! Dustin pops over the pond for a visit to AstroCamp!   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.

Objective: objects! Hosted by Steve Nerlich. Dear Cheap Astronomy – How often does the solar system capture or eject things? The first evidence that stellar systems might eject things were observations of rogue planets knocked out of their systems due to gravitational interactions and now populating interstellar space. For every rogue planet knocked out its system there are likely thousands of smaller objects also knocked out that are just too small for us to observe. We call this rogue population interstellar objects.   Dear Cheap Astronomy – What else is going on in the asteroid mining space? What are the alternatives to CSOTM (Crash Shirt On The Moon)? Good question. There have been a number of attempts to create an asteroid mining industry despite the obvious lack of access or technological solutions. Such 'start ups' have been largely built on venture capital – the support of investors willing to take a gamble on investing in a venture unlikely to deliver profit in the near future. Asteroid mining was the focus of the high-profile Deep Space Industries launched in 2013 which developed some ideas for utilization of off-world resources, including building spacecraft and an orbiting platform for the collection and processing of off-world water for rocket fuel production, but nothing ever got off the ground and the venture, largely a think-tank, was bought out in 2019.   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.

https://www.youtube.com/watch?v=hW_eLqrmjZ4 Streamed live on Sep 21, 2026 Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest) Today we begin a new series on rockets and spacecraft, dealing with each of their components. It's a big job, so it'll take us a bunch of episodes to get through. Today let's do an introduction about what we're gonna talk about in this series: rockets from tip to tail, soup to nuts.   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.

Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org From March 2026. Today's 2 topics: - Once every 1,435 days , a 780 foot diameter space rock, 2017 TC1, that my Catalina Sky Survey teammate Carson Fuls discovered makes an annihilation defying close approach to our star. At it's nearest point to the Sun, Carson's well done space rock is traveling at an amazing 93 miles per second and receives 26 times the amount of solar radiation that heats the surface of the planet Mercury to 800° F. After Carson first discovered his heat resistant space rock traveling towards it's next hot date with the Sun, it was observed by telescopes in New Mexico, Arizona, Hawaii, and England.   - The orbits of the planets are closely aligned with the extension of the Sun's equator into space and are contained within the flattened disk of material which forms the plane solar system. Most asteroids have orbits with inclinations or tilts to the solar system's plane which are less than 20 degrees. Thus, when my Catalina Sky Survey teammate Rose Matheny discovered 2017 TF4, a small space rock which soars into the lonely space high above and below our solar system's plane, it got our attention. As with all of our asteroid discoveries, Rose had no idea of what kind of object she had discovered with our Schmidt Telescope on Mt. Bigelow, Arizona until it had been tracked by observers around the world.   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.

https://www.universetoday.com/articles/bepicolombo-successfully-begins-its-final-descent-to-mercury Written by Andy Tomaswick - September 09, 2026.  Read by our editor, Richard Drumm. The latest mission to the innermost planet in the solar system hit a milestone last week. After an eight year journey, BepiColombo finally separated from its propulsion stage to set itself up for an orbital insertion to Mercury.    Taking place on September 3rd, the separation, which is part of a much longer series of logistical steps over the next few months, seemed to go without a hitch. Because the two spacecraft were, um, hitched together, and… Ahem. But getting to that point was certainly a process, and still more challenges lie ahead.   Bio: Andy Tomaswick Andy has been interested in space exploration ever since reading Pale Blue Dot in middle school. An engineer by training, he likes to focus on the practical challenges of space exploration, whether that's getting rid of perchlorates on Mars or making ultra-smooth mirrors to capture ever clearer data. When not writing or engineering things he can be found entertaining his four children, six cats, and two dogs, or running in circles and throwing plastic discs at people to stay in shape.   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.

From September 16, 2026. Join us as we bounce between the geology behind the recent landslide in Nepal and Tibet, the joy of Saturn's south pole forming a decagon, the frustration of both US and Russian space programs having launch capacity issues, and the good news of BepiColombo getting ready to enter Mercury's orbit.   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.

Hosted by Loretta Cannon. Today's 'guest' is the planet Neptune.  I'm telling the story of the discovery of Neptune 180 years ago in September, 1846. It was initially identified using mathematics rather than a telescope. This is a story of missed opportunities, undisclosed data, a bit of professional rivalry, and a controversy that some still argue today.    H'ad astra historia is the official podcast for the Historical Astronomy Division of the American Astronomical Society.  We're here to share stories from and about the people who study the stars, planets, and the cosmos.  We'll be hearing from individuals who not only study the history of astronomy, but also those who lived it, who were "in the room" during pivotal events within the last 50 years or so.     podcast theme music: "Frost Waltz" Kevin MacLeod (incompetech.com), licensed under creative commons: by attribution 4.0 license (http://creativecommons.org/licenses/by/4.0/)    Loretta Cannon (an AAS affiliate via Rose City Astronomers) is a science-and-word-nerd who really likes outer space and the people who study it.  She quite enjoys working as HAD's podcaster, sharing astronomy stories to you.   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.

Hosted by our Director, Avivah Yamani. A light-year measures distance, not time, but it also lets us see the past. Discover how light turns every telescope into a cosmic time machine.   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.

Black Hole Power! Hosted by Dr. Paul M. Sutter. What is frame dragging? How do we measure it? And how can we turn this into a method for extracting energy from rotating black holes? 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 Watch on YouTube: http://www.youtube.com/PaulMSutter Read a book: https://www.pmsutter.com/books   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, Chris L, Alberto M, Corey D, Michael P, Naila, Sam R, Joshua, Scott M, Rob H, Scott M, Louis M, John W, Alexis, Gilbert M, Rob W, Jessica M, Jules R, Jim L, David S, Scott R, Heather, Mike S, Pete H, Steve S, Lisa R, Kevin B, Aileen G, Deb A, Michael J, Phillip L, Steven B, Mark R, Alan B, Craig B, Richard K, Joe R, David P, Justin, Tracy F, Thomas K, James C, Syamkumar M, Homer V, Mark D, Bruce A, Tim Z, Linda C, The Tired Jedi, Bob C, Stephen A, James R, Allen E, Michael S, Sheryl, David W, Chris, Michael S, Erlend A, James D, Karl W, Den K, Edward K, Scott K, Vivek D, M0PPET, Brad, Azra K, Steve R, M D Malahy, Brian O, Alonna M, Joseph B, and Anders J!   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.

https://www.youtube.com/watch?v=jFzHdB1nM9Y - With credits added. Streamed live on Sep 7, 2026. Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest) This show is supported through people like you on Patreon.com/AstronomyCast Today we do the sequel to our 2-part series. We jump to the end of the Universe, and all the major moments that will occur from now until the heat death of the Universe. The end of everything.   - The fate & future of the Milky Way - Cosmic isolation - The cosmic microwave background - The end of star formation - The degenerate era - Proton decay and entropy - Black hole evaporation & entropy - Alternate endings, cosmic rip, new beginnings - Closing thoughts and updates   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.

Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org From February 2026. Today's 2 topics: - To get an idea of the energy involved in a rocket launch, the NASA Saturn V, moon rocket, fully fueled on the launch pad contained the chemical energy of 2,000 pounds of TNT. This old technology could carry us to Mars and back on missions that would last years. To cut the mission time, the (radiation) risks, and the mass of supplies required for such a prolonged space mission NASA is looking at alternative means of rocket propulsion. Back in the 1950s NASA's project Orion was a study to investigate propelling a rocket by a series of atomic bomb explosions behind the vehicle.    - Without additional data, the true nature of the rapidly northward moving point of light my Catalina Sky Survey teammate Carson Fuls (the new Director of CSS) had just discovered would have remained a mystery. Fortunately, this new object was tracked by telescopes in both Arizona and New Mexico. These data were used to calculate it's orbit around the Sun, estimate it's size, and give it the name 2017 UX5. When Carson first spotted this enormous 1,200 foot diameter space rock it was more than 30 million miles away traveling in our direction at 10.7 mi/s. It's orbit and that of the Earth's nearly intersect and at the closest point they are about two and one half times the Moon's distance from us apart.   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.

Exodus talks about Moon phases. "ASTROMAN: the Dark Sky Guardian" is a podcast channel that aims to explore popular science in multiple disciplines and research on interdisciplinary approaches, such as sustainability, dark-sky protection, astrophotography, space exploration, astronomy innovation, inclusive science communication, and STEAM Education by integrating science and arts.   Exodus Chun-Long Sit, also known as the ASTROMAN, is a transmedia astronomy educator, popular science author, STEAM educator, and science communicator in Hong Kong. He is recently the National Astronomy Education Coordinator (Chair of Hong Kong, China) of the International Astronomical Union and President of Starrix. He was also an International Committee Member of the Dark Sky International, regularly organizing public lectures at the Hong Kong Space Museum and the Hong Kong Science Museum. He was also the author of a popular science book "Decoding the Starry Night: A Guide to Stargazing and Astrophotography".   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.

From October 19, 2020. Hosted by: Dr. Pamela L. Gay (@CosmoQuest) Today's top story brings back our favorite red giant star, Betelgeuse. A new paper published in The Astrophysical Journal (ApJ) with lead author Dr. Meridith Joyce looks at Betelgeuse as a pulsating variable star and uses atmospheric physics to bring us new insights on what the red giant is up to.   This paper combines new observations with new computer models to derive the star's mass and size from its outward behavior in much the same way that one might derive the size of a jug based on what notes can be created by blowing across its opening. Different sized objects naturally resonate in specific ways. By understanding how Betelgeuse pulsates in the fundamental mode and first overtone mode – those first two pitches you can make with your bottle – they were able to work backward to figure out Betelgeuse's physical size. This method let them then figure out more accurately the star's distance because we know how big it appears on the sky, and there is a simple mathematical relationship between how big something is and how big it appears.    Our current estimates had been based on Hipparcos measurements of how Betelgeuse appears to move relative to background objects when the Earth moves around the Sun. This technique, called parallax, can be super useful, but, trying to measure how much an object shifts, when that object is a blobby star like Betelgeuse, can be a challenge! Betelgeuse appears to be about 42 microarcseconds (mas) across and seems to shift just 5.95+0.58 or -0.85 mas. This is a really hard measurement, and Betelgeuse hasn't been looked at yet with Gaia.    By working from the theoretical size they got from its pulsation modes, and calculating a new distance, this team found that the lower edge of that error in the distance appears to be accurate, putting Betelgeuse just 530 lightyears away. This is 25% of the distance from the prior estimate, but as I said, it's within error. This closer distance makes Betelgeuse a bit smaller; it appears to be 750 times the radius of the Sun. Nevertheless, it still probably started with 20+ solar masses of material, and it will still explode in about 100,000 years. At this point, they believe, it is still burning helium in its core and is nowhere near going boom.   It's always cool when completely different techniques can narrow in on more precise values. This shows us once again that there is no one way to do science.   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.

Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes. actualastronomy@gmail.com   Top ten techniques for buying used telescope gear on Episode 552 of the Actual Astronomy podcast. I'm Chris and joining me is Shane. We are amateur astronomers who love looking up at the night sky and this podcast is for everyone who enjoys going out under the stars.   New vs. used: Baked in discount Cheaper way to try different things Less cost to buy try sell than new and get hit by depreciation Great out of production gear   Top 10 Ways to Choose Used Telescope Equipment: Dedicated Astronomy Classifieds: Buy through enthusiast platforms like  Cloudy Nights or AstroBuySell or online Japan Auction Sites rather than general marketplaces although I've had good luck on eBay too. Astronomy forums feature seller rating systems, community feedback, and knowledgeable owners who generally take better care of their optics. Inspect Glass and Mirrors for Mold or Coating Loss: A little dust on optics is normal, but avoid equipment with scratches, flaking coatings, or fungus/mold. Mold grows in damp storage conditions and permanently eats away at optical coatings. Test Mechanical Operations In Person: Arrange local pickup whenever possible to test the gear. Rack the focuser through its full range to ensure smooth motion, verify that mount lock knobs tighten properly, and check for wobbles or stripped threads. Verify GoTo Electronics and Tracking Motors: For computerized or tracking mounts, power on the unit to test motor slewing, controller screens, and firmware updates. Check battery compartments for acid corrosion, which frequently ruins neglected electronics. Compare Against Retail Pricing: Cross-reference the original retail listing to check the standard asking price (fair used prices generally hover around 60–75% of current retail) and confirm that missing essentials like counterweights, hand controllers, or finder scopes are accounted for in the deal. Ask for Close-Up Photos and "Pencil" Tests: If buying remotely, request high-resolution, unedited photographs of optics from multiple angles. Asking the seller to place a specific object (like a handwritten note) next to the gear helps verify that they actually possess the equipment. Inquire About Storage and Service History: Ask where the equipment was stored. Mounts kept in unconditioned sheds or outdoor garages are prone to rusted gears, degraded grease, and moisture damage. High-end mounts may also have a documented service history. Watch Out for DIY Modifications: Amateur astronomers frequently alter equipment. Ensure any past modifications—such as custom focuser upgrades, flocking, or drilled mounting plates—were executed professionally and won't hinder performance or future resale value. Evaluate Mount Payload Capacity Realistically: Don't evaluate a telescope tube in isolation; ensure the bundled or intended mount can handle the weight. For astrophotography, plan for a payload weight that is no more than half of the mount's advertised maximum capacity. Use Secure Payment Methods with Buyer Protection: When paying online or via long-distance shipping, always use payment channels that offer buyer protection (such as standard PayPal Purchase options rather than "Friends & Family") to safeguard against scams or damaged goods. Ensure the item is well protected with proper packaging. Purchase shipping insurance when acquiring expensive gear.   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.

https://www.youtube.com/watch?v=VmzJj2i81H0 Hosted by Tony Darnell. From Nov 7, 2017. Have you ever wondered what the most distant object we can see with our naked eyes is?  The answer is The Triangulum Galaxy some three million light years from Earth.  This galaxy, along with the Great Andromeda Galaxy will collide with our Milky Way in about four billion years. This galaxy collision will herald in a new era for our home galaxy The Milky Way.  We will transform into an entirely new galaxy with billions more stars.   If you like this content, please consider supporting Deep Astronomy on Patreon! Created with Stellarium Open Source Software: http://www.stellarium.org/ Original Music - Mark C. Petersen, Lochness Productions: https://www.lochnessproductions.com/   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.

Saving the world on a tight budget. Hosted by Steve Nerlich. Dear Cheap Astronomy – Can we clear all the PHOs from around Earth? A key feature of Cheap Astronomy's CSOTM (Crash Shirt On The Moon) proposal is that the most readily available source of shirt to crash are near Earth asteroids and a small number of comets. This has the double benefit of putting all the raw materials in one place, plus you are clearing out potentially hazardous objects that could collide with Earth at some time in the future.   Dear Cheap Astronomy – Can we really deflect asteroids with rocket engines? This is a follow up episode to our recent one about crashing near-Earth objects on the Moon. Where a listener wrote to critique a throw-away line we made about attaching a rocket engine to an asteroid, particularly if it was a rubble pile asteroid. They were too polite to say it's a dumb-@$$ idea, but yeah, it is probably a dumb-@$$, well sort-of maybe.   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.

https://www.youtube.com/watch?v=CDFCqCj0ofk Streamed live on Sep 7, 2026. Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest) This show is supported through people like you on Patreon.com/AstronomyCast To celebrate our 20th season, we thought we'd go back right to the beginning… of everything. Let's wind the clock back to the earliest moments of the Universe, where we'll measure time in fractions of a second. As the foundational laws of physics were laid down and we experience the repercussions to this day!   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.

Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org From February 2026. Today's 2 topics: - In an area which is about 1/400th of the entire sky, the NASA Kepler spacecraft has discovered 30 Earth like planets which are likely to have liquid water on their surfaces orbiting distant stars. These planets are likely to represent a tiny sample of the habitable planets which exist in the Milky Way. In spite of our efforts to find them, the question remains where are the alien civilizations? In a recent talk given at the Division of Planetary Sciences meeting Dr. Alan Stern of the Southwest Research Institute suggests that perhaps the majority of worlds with biology and intelligent civilizations exist on interior water ocean worlds where their existence is hidden by the thick layers of rock and ice which separate them from the hostile vacuum of space.   - Eighteen hours before my Catalina Sky Survey teammate Rose Matheny first spotted 2017 UJ2, a small space rock with our Schmidt telescope on Mt. Bigelow, Arizona it had passed less than the Earth's diameter from the surface of our planet. Rose was able to discover this Smart Car sized space rock after it moved out of the Sun's glare. At this point it was about the Moon's distance from her and was traveling away at 3.4 mi/s. After Rose posted her discovery observations on the Minor Planet Center's Near Earth Object Confirmation page, for the next 24 hours it was tracked by telescopes in Spain, Illinois, and Arizona.   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.

Hosted by Rob Starks. The newest DESI Legacy Imaging Surveys map, 13 years in the making, covers three-quarters of the sky and catalogs nearly four billion objects. This treasure trove is available to all and contains stars, galaxies, supernovae, gravitational lenses, and much more. Two NSF NOIRLab facilities contributed data to the map: the U.S. National Science Foundation (NSF) Mayall telescope and the NSF Blanco telescope, equipped with the U.S. Department of Energy-fabricated DECam. In this podcast, Dr. John Moustakas discusses the surveys, the data and how it will impact future astronomical research.    Dr. John Moustakas is an associate professor of physics and the Department Chair in the Department of Physics & Astronomy at Siena University. His broad research interests are in observational cosmology and astrophysics, with a focus on using the most powerful telescopes on earth and in space to understand how galaxies have formed and evolved (changed) in a 14 billion-year universe which is dominated by dark matter. He is also interested in dark energy, the mysterious cosmic phenomenon which is causing the expansion rate of the universe to accelerate.   Rob Sparks is in the Communications, Education and Engagement group at NSF's NOIRLab in Tucson, Arizona.   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.

From February 15, 2021. A newly found object nearly four times farther out from the Sun than Pluto now holds the record for the farthest observed in our solar system. Plus, forming Super Earths, finding potentially habitable planets, jellyfish galaxies, the Crab Nebula, and this week's What's Up.   D100 in the Coma Cluster: https://science.nasa.gov/asset/hubble/h-alpha-tail-of-d100/   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.

https://www.universetoday.com/articles/7-stage-journey-reveals-how-falling-space-rocks-survive-air By Laurence Tognetti, MSc - August 31, 2026. Recorded by our Editor, Richard Drumm. At least once in our lives, we've all seen a bright streak of light briefly blaze across the sky and have quickly referred to it as an asteroid, meteor, shooting star, comet, or some other whimsical name we've heard others use to describe it. For those calling it a meteor, you would be correct, but we'll touch upon this later. The time it takes for a space rock, bolide being its scientific name, to travel through Earth's atmosphere and crash into the ground literally takes only a few seconds. But what happens to a space rock during this very brief travel time, and how can scientists use this to learn about a specific space rock's origin and the potential damage it could cause if it explodes in mid-air?   Phase 1: Atmospheric entry;  Phase 2: Brightness begins;  Phase 3: Brightness increases with fireball appearance;  Phase 4: Brightness maintains while melting begins;  Phase 5: Front of rock begins to break apart;  Phase 6: Back of rock breaks apart;  Phase 7: Melting and breaking apart continue until glowing stops, followed by melting ending and wind discards crusted pieces. [Editor's Note: OK, that could be 8 stages if you'd prefer…]   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.

https://www.youtube.com/watch?v=R6lOpIWbly4 From July 23, 2026. Hosted by Mike Simmons. Episode 19. https://astro4equity.org - Visit our website! Dr. Kelly Blumenthal is an astrophysicist and science communicator who has lived in and worked with many communities across the United States and worldwide. These experiences have shaped Kelly's perspectives on the importance of astronomy communication in building STEM opportunities for under-resourced people worldwide and its role in science generally. Kelly is now the director of the International Astronomical Union's Office of Astronomy Outreach (OAO), hosted by the National Astronomical Observatory of Japan in Tokyo. The Office is represented by its network of National Outreach Coordinators in more than 100 countries.   In this episode, Kelly shared her experience working as an astrophysicist and how she became the OAO's Director, the importance of science communication, dark skies, and the development of AstroACCEL.   The Role of Astronomy in Science Communication: 0:00 Engaging Communities Through Astronomy Outreach: 5:44 Professional Development in Astronomy Communication: 9:02 The Importance of Conferences in Astronomy Outreach: 11:18 Case Studies in Astronomy Education: 13:20 Astronomy as a Gateway to STEM: 18:10 Highlighting Women in Astronomy: 23:40 Protecting Our Dark Skies: 27:49 Engaging Youth in Astronomy Education: 32:20 Bridging Gaps in Astronomy Communication: 34:32 Personal Journeys in Astronomy: 41:22 Navigating Challenges in Astronomy Careers: 53:10   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.

Mapping Alien Worlds! Hosted by Dr. Paul M. Sutter. Just how hard are exoplanets observations? What kind of telescope will it take to find life? And how much information can we get out of a single pixel of light? 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 Watch on YouTube: http://www.youtube.com/PaulMSutter Read a book: https://www.pmsutter.com/books   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, Chris L, Alberto M, Corey D, Michael P, Naila, Sam R, Joshua, Scott M, Rob H, Scott M, Louis M, John W, Alexis, Gilbert M, Rob W, Jessica M, Jules R, Jim L, David S, Scott R, Heather, Mike S, Pete H, Steve S, Lisa R, Kevin B, Aileen G, Deb A, Michael J, Phillip L, Steven B, Mark R, Alan B, Craig B, Richard K, Joe R, David P, Justin, Tracy F, Thomas K, James C, Syamkumar M, Homer V, Mark D, Bruce A, Tim Z, Linda C, The Tired Jedi, Bob C, Stephen A, James R, Allen E, Michael S, Sheryl, David W, Chris, Michael S, Erlend A, James D, Karl W, Den K, Edward K, Scott K, Vivek D, M0PPET, Brad, Azra K, Steve R, M D Malahy, Brian O, Alonna M, Joseph B, and Anders J!   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.

From September 10, 2007. Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest) This is a very different episode of Astronomy Cast. As we mentioned last week, Pamela recently attended the Dragon*Con science fiction convention in Atlanta, Georgia. While she was there, she participated in a special live edition of Astronomy Cast with special guest Dr. Kevin Frazier. Kevin is a NASA scientist, and the science consultant for the TV shows Battlestar Galactica and Eureka. He and Pamela work through physics and astronomy in popular science fiction. What they get right, and what they get wrong... so very wrong.   Role of Science Consultants in Media: Dr. Grazier shares insights into his work as a science consultant, emphasizing the importance of scientific accuracy in storytelling and how it enhances narrative credibility. Analysis of Battlestar Galactica and Eureka: The conversation explores specific examples from these series, highlighting where scientific principles are accurately depicted and where creative liberties are taken. Common Misconceptions in Sci-Fi: They address prevalent scientific inaccuracies in science fiction, such as sound in space and unrealistic space travel mechanics, and discuss their impact on public understanding of science. Balancing Science and Storytelling: The discussion delves into the challenges writers face in integrating complex scientific concepts into engaging narratives without overwhelming the audience. Audience Interaction: Recorded live at Dragon*Con, the episode features questions from the audience, providing additional perspectives and inquiries about science in media.   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.

Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org From January & February 2026. Today's 2 topics: - On Earth, human life is enabled by plants which provide us with calories, vitamins, fuel, medicines, and oxygen to breathe. In addition, recent scientific studies indicate that plant cultivation reduces anxiety and depression and has a positive influence on diabetes, heart disease, obesity, and longevity. Perhaps this is the reason that 80% of the cultivated plant species on planet Earth are not used for any food related purpose. On long duration space missions astronauts live in close quarters isolated from the natural world where the basic activities like eating, sleeping, and attending to bodily functions are difficult and stress producing.    - On it's gravitational leash, Earth's pet space rock, 2016 HO3, accompanies us at a distance of between 38 and 100 times the Moon's distance from Earth as we both travel about the Sun. As this tiny asteroid orbits the Sun it spends about half of its time inside the Earth's orbit where it moves faster and passes ahead of us and the other half of its yearly path outside of our orbit which causes it to lag behind our home planet. Since its discovery little has been known about Earth's pet space rock leaving some to speculate that perhaps it is an old rocket booster or other piece of space junk.   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.

Hosted by our Director, Avivah Yamani. September's equatorial sky features Venus, Saturn, Mars, Jupiter, dark Milky Way nights, the September equinox, and a lunar occultation of Venus.   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.

Hosted by: Dr. Pamela L. Gay (@CosmoQuest) From September 1, 2026. In this special episode, funded by the National Science Foundation, we're taking a break from the headlines to study the changing anatomy of a comet.   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.

Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes. actualastronomy@gmail.com   In Episode 549 of Actual Astronomy, hosts Chris and Shane present the Observer's Calendar for September 2026, highlighting key celestial events for amateur astronomers throughout the month. Highlights include the Sept 1 Aurigids meteor shower peak, a Venus-Spica conjunction on Sept 2, two regional star parties in early September, and a Moon occultation of Jupiter on Sept 8. Observing targets throughout the month feature various lunar features like the Lunar X and Straight Wall, deep-sky objects, multiple carbon stars, Neptune reaching opposition on Sept 25, and the Harvest Full Moon on Sept 26.   Sept 1: Aurigids peak (ZHR=10) predawn; γ Del double star; M27 well placed in evening Sept 2: Venus 1.7° South of Spica Sept 4: Last Quarter Moon (2:11) Sept 5: Lunar X visible Sept 6: Alberta Star Party begins; Mars 3° South of Moon; Moon at perigee; NGC 6781 well placed; B142/3 well placed; Carbon star W Orionis in pre-dawn Sept 7: Labour Day; M71 well placed; Carbon star HK Lyr in evening Sept 8: Northern Prairie Star Party begins; Moon occults Jupiter (2:58 pm); M27 well placed; Max R Aql (9:00 pm); Star Trek 60th anniversary Sept 9: NGC 6905 well placed; Carbon star RV Mon in pre-dawn; Zodiacal Light in E before morning twilight Sept 10: New Moon (23:27); Uranus Stationary; Old crescent Moon in E before sunrise; M39, M29 well placed Sept 11: Veil Neb well placed Sept 12: NGC 7000 well placed Sept 13: NGC 6946 well placed Sept 14: Venus 0.5° South of Moon; IC 5146 well placed; Carbon star U Cyg in evening Sept 15: NGC 6819 well placed Sept 16: NGC 6826 well placed Sept 17: First Quarter Moon (18:44) Sept 18: Venus greatest illuminated extent;  Sept 19: Lunar Straight Wall this evening; Two shadows on Jupiter visible (9:03 pm) Sept 20: Follow Capella unaided into daylight this week Sept 22: Autumnal Equinox (12:00 am); Jeweled Handle (12:00 am) Sept 24: Crater Billy (9:00 pm) Sept 25: Neptune at opposition;  Sept 26: Full Moon / Harvest Moon (12:49); Two shadows on Jupiter (10:56 pm); Mare Orientale (9:00 pm); Crater Einstein (4:00 am); Carbon star V Cyg in evening Sept 30: 192 Nausikaa at opposition (m=8.4)   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.

September Part 1! Paul Hill and Dr. Jenifer "Dr. Dust" Millard host.  Damien Phillips, John Wildridge and Dustin Ruoff produce. So it turns out…  -The Milky Way may have done a back flip… -News about the Swift telescope,  -NASA raiding its bare cupboards, and -A super fast star.  -A nova in Sagitta! Also… -Our usual skyguide and wittering.  -Oh, and a song.  You will be full of antici……….pation!   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.

https://www.youtube.com/watch?v=frcLSXuzzyY Hosted by Tony Darnell. From October 24, 2010. On Oct 19, 2010, astronomers announced the measurement of a redshift of 8.6 for one of the galaxies in the Ultra Deep Field. That corresponds to a galaxy seen just 600 million years after the Big Bang! Here's the news release from ESO's website: http://www.eso.org/public/news/eso1041/ The Nature paper: https://www.eso.org/public/archives/releases/sciencepapers/eso1041/eso1041.pdf   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.

http://www.astronomycast.com/archive/ Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest) From October 30, 2006. Dress warmly, gather some friends and family, and head outside to watch sand burn in the upper atmosphere. There's nothing like a good meteor shower. Fraser and Pamela explain this beautiful phenomenon: what causes them, the best storms and showers to watch for, and different types of meteors you might see.   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.

Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org From January, 2026. Today's 2 topics: - New Zealand's 4.5 million people are concentrated in three major population centers which to various degrees suffer from the modern plague of light pollution. However, most of New Zealand's large rural areas and land reserves, covering an area as large as the UK, have unpolluted natural night skies. A completely unique place to experience New Zealand's natural night sky is the Aotea-Great Barrier Island International Dark Sky Sanctuary. It encompasses New Zealand's, 110 square mile, sixth largest island, which is located about 62 miles from central Auckland. It is easily accessible by boat or a short airline flight.   - In less than 24 hours, while observing with the Catalina Sky Survey's 60 inch telescope on Mt. Lemmon, Arizona, I discovered two 25 foot diameter space rocks that can theoretically pass less than a quarter of the Moon's distance from us. After I posted my discovery observations on the Minor Planet Center's Near Earth Object Confirmation page one of them received immediate attention, as an incoming object, and was tracked by observers at 14 different observatories around the world. Scientists at the Minor Planet Center used these data to calculate its 926 day orbital path around the Sun, estimate its size, and give it the name 2017 TH5.    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.

Hosted by our Director, Avivah Yamani. What is a syzygy? Explore one of astronomy's strangest words and discover how the Sun, Earth, Moon, eclipses, transits, and tides are all connected by cosmic alignment.   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.

Hosted by: Dr. Pamela L. Gay (@CosmoQuest) From August 13, 2026. Across a long career, Dr. William Hartmann has done everything from innovating how the Moon was formed to founding the Planetary Science Institute to defining space art for a new generation; a generation that included host Pamela Gay. Tune in to hear about science, art, and how they can mix as individuals both make new discoveries, and the illustrations to accompany them!   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.

https://www.youtube.com/watch?v=Rx1276dpHe4 From Jan 14, 2020. Hosted by: Fraser Cain (@frasercain) Once again, at the AAS Meeting in Hawaii, I got a chance to sit down with another astronomer to talk about their research. This time it was Dr. David Kipping from Columbia University's Cool World's Lab. We talked about how easy it'll be for aliens to know our planet is inhabited, and some ways we might be able to hide the evidence of our existence. Dr. Kipping's channel: https://www.youtube.com/channel/UCGHZpIpAWJQ-Jy_CeCdXhMA   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.

https://www.youtube.com/watch?v=ivzbZRWkMUg Hosted by Tony Darnell. From Nov 12, 2019. NASA's Transiting Exoplanet Survey Satellite has completed its first year of science operations and to show for it, NASA has released this amazing mosaic of the entire southern celestial hemisphere.   This video was written by NASA Goddard folks, you can watch the original here:  https://svs.gsfc.nasa.gov/13285   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.

Some place in space. Hosted by Steve Nerlich. Dear Cheap Astronomy – What is the role of AI in space? AI simulates human decision-making and finds most practical usage in the sorting and analysing of various kinds of data. So. you can feed an AI program pictures of galaxies and the classifications they fit into and then the AI can then identify and classify new ones that you feed it. It's kind of like how Galaxy Zoo used to work, except with Galaxy Zoo it was actual crowd-sourced people that did the work.   Dear Cheap Astronomy – What will space warfare look like? We've previously discussed on this podcast that fighting a war from space is probably a bad idea. You might conceivably drop a bomb from orbit, but once you've identified yourself as an enemy it's pretty easy to take you out from the ground. You may be able to dodge a few missiles at the start, but once you're out of maneuvering fuel you'll be stuck in a straight-line orbit and hence a sitting duck.   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.

From August 11, 2008. Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest) Last week we talked about rockets. How they work, how they go BOOM!, their limitations. And this week we're going to look at the future of propulsion systems. From the ion engines that are already working to explore the Solar System to the prototype solar sails to futuristic technologies like magnetic sails, and bussard ramjets. This is how we'll travel to other stars.   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.

Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org From December 2025 & January 2026. Today's 2 topics: - Many people in our modern world rarely if ever experience night vision. To achieve this interesting state of sensory awareness you cannot look at your cell phone or any other source of bright light for 30 to 45 minutes. Your night vision comes about over time because the rod sensors in the retina of your eye undergo a chemical change when they are placed in total darkness. The process starts immediately but takes 20 to 30 minutes to get 80% of maximum sensitivity. The night vision process can be reversed in seconds by exposure to a bright light. In its most sensitive state your eye can function with a billion times less light than is present in strong sunlight enabling you to see a candle flame from 1.6 miles away.   - In November of 2006, University of Arizona's Spacewatch astronomers on Kitt Peak discovered a faint moving point of light in the night sky which appeared to be a garden variety main belt asteroid orbiting the Sun between Mars and Jupiter. The Minor Planet Center calculated it's orbit and gave it the name 2006 VW139. Five years later when it again moved closest to the Sun the Pan-STARRS group in Hawaii discovered that 2006 VW139 is surrounded by a gas cloud like a comet and it was given a comet designation, 288P.    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.

Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes. actualastronomy@gmail.com   On Episode 547 of Actual Astronomy, hosts Chris and Shane guide listeners through observing an array of August Messier objects across the constellations Ophiuchus, Scorpius, and Sagittarius. The show details viewing techniques for globular and open clusters—highlighting targets like the egg-shaped globular M19, the historical Ptolemy's Cluster (M7), and the beginner-friendly M23. Additionally, they explore iconic Milky Way nebulae, including the active star-forming Lagoon Nebula (M8) and the nearby Trifid Nebula (M20) with its distinctive three-lobed dark dust lanes.   1. M10 & M12 (Globular Clusters in Ophiuchus) - Binoculars: Sweeping through central Ophiuchus reveals these two bright globulars in the same binocular field. They appear as soft, distinct bluishgray spheres. - Telescope: In an 8-inch telescope, M12 resolves well into individual stars across its core, while M10 appears somewhat more tightly packed, brighter toward the center, and slightly fuzzier at the edges. - Compare the two side-by-side: Despite being located near each other in our sky, M12 has lost a significant portion of its lower-mass stars due to repeated passages through the Milky Way's dense galactic disk.   2. M107 (Globular Cluster in Ophiuchus) - Binoculars: A challenging target for binoculars; requires dark skies and averted vision to spot as a minute, faint smudge. - Telescope: Small-to-medium telescopes reveal a delicate, somewhat un-concentrated patch of light with a loose core. - M107 contains noticeable dark dust lanes or obscuring regions, which is relatively rare for a globular cluster, giving it a unique visual texture in medium-to-large scopes.   3. M9 (Globular Cluster in Ophiuchus) - Binoculars: Similar in scale to M107, though slightly brighter and easier to catch in 10x50s on a clear night. - Telescope: Small scopes show a bright, unresolved central nucleus surrounded by a faint, grainy halo. - M9 is located remarkably close to the Galactic Centre—only about 5,500 light-years away from it. It lies near dark nebulae like Barnard 64, making the surrounding starfield visually compelling.   4. M19 & M62 (Globular Clusters in Ophiuchus) - Binoculars: Separated by about 4 degrees, both fit easily into a standard binocular field of view south of M10/M12. They look like round, soft patches brightening toward their centers, with M19 appearing noticeably brighter. - Telescope: Smaller telescopes show compact, fuzzy disks. Moderate magnification begins resolving outer stars on both. - M19 is famous for being one of the most distinctly oblate (egg-shaped) globular clusters known, likely due to tidal forces from its proximity to the galactic core. - M62 has an asymmetric core, heavily deformed by galactic tidal forces, and hosts a rich population of millisecond pulsars.   5. M6 (The Butterfly Cluster) & M7 (Ptolemy's Cluster) Scorpius - Naked Eye: Both are bright and obvious to the naked eye under dark skies near the "stinger" of Scorpius. - Binoculars: Binoculars provide the absolute best view. Both clusters fit together in a wide 10x50 field. M7 is larger and brighter; M6 displays a striking butterfly-like star arrangement. - M7 is one of the oldest recorded deep-sky objects, noted by Ptolemy in 130 AD. - The orange giant star BM Scorpii, which sits on the wing of the "Butterfly" in M6 and adds a nice pop of stellar color contrast.   6. M8 (The Lagoon Nebula) Sagittarius - Naked Eye: Appears as a distinct, hazy patch in the Milky Way band above Scorpius. - Binoculars: Shows as a huge, glowing oval patch—larger than the full Moon—with several bright stars embedded within it. - Telescope / Filters: A UHC or O-III filter enhances the dark dust lane ("the lagoon") bisecting the bright nebulosity. - M8 is an active star-forming region containing Bok globules (collapsing clouds of protostellar gas) and the famous "Hourglass Nebula" region at its core.   7. M20 (The Trifid Nebula) Sagittarius - Binoculars: Located just 1.4 degrees northwest of M8. Appears as a faint, ghostly glow surrounding a central triple/multiple star system. - Telescope: Medium scopes under dark skies reveal the dark dust lanes splitting the bright emission portion into three distinct lobes. - M20 is a rare "triple threat" nebula containing an emission nebula (red in photos), a reflection nebula (blue in photos), and a dark dust lane network (Barnard 85) that gives it its name.   8. M21 (Open Cluster) Sagittarius - Binoculars: Situated right next to M20. Appears as a small, compact, bright knot of stars. - Telescope: Low-power views easily resolve 20–30 stars packed tightly together. - The "Trifid Trio": In wide-field eyepieces or binoculars, you can view M8, M20, and M21 all in a single field of view, offering one of the most spectacular Milky Way vistas available to visual observers.   9. M23 (Open Cluster) Sagittarius - Telescope: Low magnification is key. Small telescopes easily resolve over 80–100 stars spread across a wide field in subtle arc-like patterns. - M23 sits against a rich background Milky Way star field, making low-power wide-field views ideal. It is an excellent target for beginners practicing star-hopping in northern late-summer skies.   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.

Hosted by our Director, Avivah Yamani. Meet S301, the fastest known star in the Milky Way, racing around Sagittarius A* and offering astronomers a new way to measure the spin of our galaxy's supermassive black hole.   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.

From July 30, 2026. Hosted by: Dr. Pamela L. Gay (@CosmoQuest) Science comes from many corners, and there is a need for both 600-m radio telescopes made on a great plain (Like the RATAN-600) and 60cm radio dishes built in a living room. In this After Hours, we talk with ASU professor Dr. Danny Jacobs (https://danielcjacobs.com)about how he engages students of all kinds in space sciences through educational tools like the cardboard radio telescope (https://astrochart.github.io), and in space telescope operations with the SPARCS small sat. (https://sparcs.asu.edu/)    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.

August Part 2. Paul Hill hosts solo! Damien Phillips, John Wildridge and Dustin Ruoff produce. Join Paul in his Astronomy lair as he live sketches the Eclipse, chats to neighbours and talks Astronomy news while spotting Perseid meteors.   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.

Physics under pressure! Hosted by Dr. Paul M. Sutter. What was the big deal about Chandrasekhar's discovery? Why did he meet so much resistance? How is his work tied to everything from supernovae to black holes? 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 Watch on YouTube: http://www.youtube.com/PaulMSutter Read a book: https://www.pmsutter.com/books   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, Chris L, Alberto M, Corey D, Michael P, Naila, Sam R, Joshua, Scott M, Rob H, Scott M, Louis M, John W, Alexis, Gilbert M, Rob W, Jessica M, Jules R, Jim L, David S, Scott R, Heather, Mike S, Pete H, Steve S, Lisa R, Kevin B, Aileen G, Deb A, Michael J, Phillip L, Steven B, Mark R, Alan B, Craig B, Richard K, Joe R, David P, Justin, Tracy F, Thomas K, James C, Syamkumar M, Homer V, Mark D, Bruce A, Tim Z, Linda C, The Tired Jedi, Bob C, Stephen A, James R, Allen E, Michael S, Sheryl, David W, Chris, Michael S, Erlend A, James D, Karl W, Den K, Edward K, Scott K, Vivek D, M0PPET, Brad, Azra K, Steve R, M D Malahy, Brian O, Alonna M, Joseph B, and Anders J!   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.

http://www.astronomycast.com/archive/ From December 12, 2008. Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest) In the old days, astronomers had to beg for telescope time. They'd put together a proposal, convince observatories to gather data for them, crunch that data and release the results. No telescope, no results. But everything's different now. Fleets of robotic telescopes constantly scan the skies, building up a vast database of raw data about the Universe. Anyone who wants can access the information through the Internet, download what they need to do real science. No telescope necessary. Let's look at the development of sky surveys, and how they're changing how astronomy gets done.   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.

Dr. Al Grauer hosts. Dr. Albert D. Grauer ( @Nmcanopus ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. travelersinthenight.org From December 2025. Today's 2 topics: - Dr. Lance Benner of NASA's Jet Propulsion Laboratory headed up a team of scientists who used the 70 meter antenna at NASA's Goldstone Deep Space Communications Complex to bounce RADAR beams off of the asteroid Florence as it made a close approach to Earth in September of 2017. The RADAR images these researchers obtained reveal that Florence consists of a 2.8 mile diameter primary asteroid which is orbited by two small moons.   - Venus and Earth are similar in size, composition, density, and mass. Unfortunately, our sister planet Venus is an example of a place where green house gases have created an extreme situation. Venus's thick carbon dioxide atmosphere has a surface pressure 90 times that of Earth. It would crush a submarine. Additionally, the thick atmospheric blanket holds in the heat causing Venus's surface temperature to be 864 F, hot enough to melt lead.   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.

Today's episode is all about last Wednesday's total solar eclipse. But you have a partial lunar eclipse that's coming up that you can look forward to on August 27-28!   "ASTROMAN: the Dark Sky Guardian" is a podcast channel that aims to explore popular science in multiple disciplines and research on interdisciplinary approaches, such as sustainability, dark-sky protection, astrophotography, space exploration, astronomy innovation, inclusive science communication, and STEAM Education by integrating science and arts.   Exodus Chun-Long Sit, also known as the ASTROMAN, is a transmedia astronomy educator, popular science author, STEAM educator, and science communicator in Hong Kong. He is recently the National Astronomy Education Coordinator (Chair of Hong Kong, China) of the International Astronomical Union and President of Starrix. He was also an International Committee Member of the Dark Sky International, regularly organizing public lectures at the Hong Kong Space Museum and the Hong Kong Science Museum. He was also the author of a popular science book "Decoding the Starry Night: A Guide to Stargazing and Astrophotography".   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.

Hosted by: Dr. Pamela L. Gay (@CosmoQuest) From July 22, 2026. On July 20, the world celebrates International Moon Day. This UN designated holiday marks the anniversary of humanity's first landing on the Moon. The Apollo 11 landing in 1969 is now only a distant memory or a date from history for most people, but it is worth thinking about as the world prepares to return humans to the Moon in the coming decade. Joining us to discuss International Moon Day is Dr. Jekan Thanga, the head of the Space TREx Laboratory at the University of Arizona. Come learn how his interdiciplinary team is taking a page from the past as we plan for a Lunar future.   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.

https://www.youtube.com/watch?v=IQtdQ94jy8I From Oct 17, 2017. Hosted by: Fraser Cain (@frasercain) Some comets orbit the Sun on a regular basis, but others come in from deep space, a region known as the Oort Cloud. What causes them to make this journey, and will we ever be able to explore the Oort Cloud?   Before I get into this episode, I want to remind everyone that it's been several decades since I've been able to enjoy a bright comet in the night sky. I've seen mind blowing auroras, and witnessed a total solar eclipse with my own eyeballs. The Universe needs to deliver this bright comet for me, and it needs to do it soon.   [Editor's note: Rich here. I'm spoiled by comet Hyakutake.]   By recording this video now, I will summon it. I will create a video that'll be hilariously out of date in a few months, when that bright comet shows up.   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.