The 365 Days of Astronomy podcast launched in 2009 as part of the International Year of Astronomy. This community podcast continues to bring you day after day of content across the years. Everyday, a new voice, helping you see the universe we share in a new way. This show is managed by Avivah Yamani, edited by Richard Drumm. This podcast is funded through Patreon.com/CosmoQuestX and produced out of the Planetary Science Institute.
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Nov 13, 2026 · 19:26
From December 13, 2019. We've had an amazing trip, even if we didn't get to see rocket launches. But we can't help but to comment on science when we see it mishandled, and this…
Nov 12, 2026 · 5:04
https://spacescoop.org/en/scoops/2607/a-mysterious-shock-wave/ From April 29, 2026. Hosted by Dr. Pamela L. Gay ( @CosmoQuest ) A white dwarf's colorful bow shock has astronomers…
Nov 11, 2026 · 9:15
https://www.youtube.com/watch?v=uAuyv9TCThI Hosted by: Fraser Cain ( @frasercain ) From Jan 17, 2017. In 1859, the Sun gave off the most powerful solar flare on record. A blast…
Nov 10, 2026 · 50:05
Paul Hill, Ralph Wilkins and Dr. Jenifer "Dr. Dust" Millard host. Damien Phillips, John Wildridge and Dustin Ruoff produce. Recorded in 2018. Paul, Ralph & Jeni interview Libby…
Nov 9, 2026 · 32:21
https://www.youtube.com/watch?v=J0DTzACDj7Y Hosted by: Fraser Cain ( @frasercain ) and Dr. Pamela L. Gay ( @CosmoQuest ) Streamed live on Oct 27, 2026. Once again, chemical…
Nov 8, 2026 · 6:05
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…
Nov 7, 2026 · 6:12
Hosted by our Director, Avivah Yamani. Explore November's equatorial night skies with Avivah! We've added a new way to donate to 365 Days of Astronomy to support editing,…
Nov 6, 2026 · 20:34
From October 31, 2026. Hosted by: Dr. Pamela L. Gay ( @CosmoQuest ) This episode has everything! Creepy hands, cats, white dwarfs, and a whole lot of Pluto-sized worlds (from the…
Nov 5, 2026 · 25:36
Hosted by Chris Beckett & Shane Ludtke , two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes.…
Nov 4, 2026 · 58:53
Paul Hill and Dr. Jenifer "Dr. Dust" Millard host. Damien Phillips, John Wildridge and Dustin Ruoff produce. This month there is news of a zombie star racing through stellar…
Nov 3, 2026 · 30:42
Strange Skies! Hosted by Dr. Paul M. Sutter. What are UFOs? What are the chances that aliens have visited the Earth? Why should we bother talking about it? I discuss these…
Nov 2, 2026 · 32:18
https://www.youtube.com/watch?v=NUAmf_p-FKU Hosted by: Fraser Cain ( @frasercain ) and Dr. Pamela L. Gay ( @CosmoQuest ) Streamed live on Oct 27, 2026. The majority of rockets…
Nov 1, 2026 · 6:05
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…
Oct 31, 2026 · 27:45
https://www.youtube.com/watch?v=B9P_8oZ4rCA Hosted and recorded by: Fraser Cain ( @frasercain ) From Oct 23, 2026. The Japanese mission is off to Phobos. Heck, to Deimos too!…
Oct 30, 2026 · 51:09
Hosted by: Dr. Pamela L. Gay ( @CosmoQuest ) From July 2, 2020. Join us today as we talk about the first exposed planetary core ever discovered. We examine research that…
Oct 29, 2026 · 51:15
https://www.youtube.com/live/H0qVigc9gnQ Hosted by: Dr. Pamela L. Gay ( @CosmoQuest ) Book Talk with Dr. Kimberly K. Arcand & Megan Watzke. Streamed live on Feb 6, 2026. When…
Oct 28, 2026 · 6:21
Written & hosted by our Director, Avivah Yamani. Why do astronomers call oxygen and carbon metals? Explore how stars created the elements that formed planets, and eventually, us!…
Oct 27, 2026 · 14:52
Hosted by Steve Nerlich. Who knew? Dear Cheap Astronomy – Do gravitons exist? Once again we're dealing with something hypothetical here – so much like virtual particle pairs that…
Oct 26, 2026 · 30:24
https://www.youtube.com/watch?v=rK6w8ZHm8UM Streamed live 18 Oct 2026. Hosted by: Fraser Cain ( @frasercain ) and Dr. Pamela L. Gay ( @CosmoQuest ) Today we continue looking at…
Oct 25, 2026 · 6:05
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…
Oct 24, 2026 · 7:00
https://www.youtube.com/watch?v=vvSNWnHZpjc Hosted by: Fraser Cain ( @frasercain ) From Oct 4, 2016. Black holes are the most impressive objects in the Universe, but when happens…
Oct 23, 2026 · 36:21
From October 21, 2026. Hosted by Dr. Pamela L. Gay ( @CosmoQuest ) This week we look at the weird results in space science. From looking at how wildly different images from…
Oct 22, 2026 · 14:45
Hosted by Steve Nerlich. A podcast of sorts… Cheap Astronomy gets organized! Dear Cheap Astronomy – How are asteroids organized? The large majority of asteroids in the solar…
Oct 21, 2026 · 1:14:22
October Part 2. Paul Hill and Dr. Jenifer "Dr. Dust" Millard host. Damien Phillips, John Wildridge and Dustin Ruoff produce. Jeni gives us the low down on the Nancy Grace Roman…
Oct 20, 2026 · 23:16
Light Up Empty Space! Hosted by Dr. Paul M. Sutter. How does the vacuum interact with light? Is it possible to use light to create something from nothing? And is "birefringence"…
Oct 19, 2026 · 34:01
https://www.youtube.com/watch?v=mcn6f_PE14o Spinney things! Streamed live 18 Oct 2026. Hosted by: Fraser Cain ( @frasercain ) and Dr. Pamela L. Gay ( @CosmoQuest ) Our journey…
Oct 18, 2026 · 6:05
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…
Oct 17, 2026 · 11:14
Galileo turned the telescope skyward and transformed astronomy, revealing lunar mountains, sunspots, Jupiter's moons, and a Universe far larger than imagined. "ASTROMAN: the Dark…
Oct 16, 2026 · 49:40
Hosted by Chris Beckett & Shane Ludtke , two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes.…
Oct 15, 2026 · 21:02
From November 2020. The brightest kilonova ever was detected and challenges current gamma-ray burst models. Plus, the history of water on both Venus and Mars, how radioactive…
Oct 14, 2026 · 8:05
https://www.universetoday.com/articles/nasa-selects-gimli-to-search-the-marius-lunar-pit-for-a-potential-lunar-base-site Recorded by our editor, Richard Drumm. Written by Matthew…
Oct 13, 2026 · 18:54
Paul Hill hosts solo! Damien Phillips, John Wildridge and Dustin Ruoff produce. In this podcast extra episode we talk to Dr. Karen Masters, Associate Professor of Physics and…
Oct 12, 2026 · 31:31
https://www.youtube.com/watch?v=GhkGOIAhBWc Hosted by: Fraser Cain ( @frasercain ) and Dr. Pamela L. Gay ( @CosmoQuest ) Streamed live on Oct 3, 2026. Mission Tech Part 3.…
Oct 11, 2026 · 6:05
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…
Oct 10, 2026 · 17:48
Neutron stars, the compact remains of a massive star following a supernova explosion, are the densest matter in the Universe. Some neutron stars, known as magnetars, also claim…
Oct 9, 2026 · 22:20
From September 23, 2026. This week we're doing a weather check. No, really. Let's talk about the weather! All of them! We've added a new way to donate to 365 Days of Astronomy to…
Oct 8, 2026 · 6:58
Hosted by our Director, Avivah Yamani. Explore October 2026's equatorial skies as we have Saturn at opposition, Mercury at dusk, Orionid meteors, and the Moon's celestial…
Oct 7, 2026 · 1:03:00
October Part 1. Paul Hill and Dr. Jenifer "Dr. Dust" Millard host. Damien Phillips, John Wildridge and Dustin Ruoff produce. We dive into autumn with a baby Planet, the SMILE…
Oct 6, 2026 · 28:56
Solar System Badlands! Hosted by Dr. Paul M. Sutter. How did the scattered disk of the solar system form? What kins of strange objects roam those badlands? And what does it do to…
Oct 5, 2026 · 37:13
https://www.youtube.com/watch?v=87imhw2ljNU Hosted by: Fraser Cain ( @frasercain ) and Dr. Pamela L. Gay ( @CosmoQuest ) Streamed on October 3, 2026. Today our series continues…
Oct 4, 2026 · 6:05
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…
Oct 3, 2026 · 5:57
Hosted by our Director, Avivah Yamani. Why is Pluto a dwarf planet? Discover how new findings changed the definition of a planet—and our perspective on the Solar System. We've…
Oct 2, 2026 · 10:50
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…
Oct 1, 2026 · 37:35
Hosted by Chris Beckett & Shane Ludtke , two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes.…
Sep 30, 2026 · 59:36
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…
Sep 29, 2026 · 14:43
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…
Sep 28, 2026 · 33:03
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…
Sep 27, 2026 · 6:05
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…
Sep 26, 2026 · 7:29
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…
Sep 25, 2026 · 27:02
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…
Sep 24, 2026 · 35:06
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…
Sep 23, 2026 · 6:05
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…
Sep 22, 2026 · 29:07
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…
Sep 21, 2026 · 38:06
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…
Sep 20, 2026 · 6:05
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…
Sep 19, 2026 · 9:40
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…
Sep 18, 2026 · 16:02
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…
Sep 17, 2026 · 55:38
Hosted by Chris Beckett & Shane Ludtke , two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes.…
Sep 16, 2026 · 6:39
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…
Sep 15, 2026 · 15:04
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…
Sep 14, 2026 · 40:27
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…
Sep 13, 2026 · 6:05
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…
Sep 12, 2026 · 18:40
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…
Sep 11, 2026 · 23:03
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,…
Sep 10, 2026 · 8:23
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…
Sep 9, 2026 · 51:45
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…
Sep 8, 2026 · 31:10
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…
Sep 7, 2026 · 58:16
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…
Sep 6, 2026 · 6:05
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…
Sep 5, 2026 · 9:09
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…
Sep 4, 2026 · 12:04
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…
Sep 3, 2026 · 26:49
Hosted by Chris Beckett & Shane Ludtke , two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes.…
Sep 2, 2026 · 59:21
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…
Sep 1, 2026 · 6:27
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…
Aug 31, 2026 · 26:26
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…
Aug 30, 2026 · 6:05
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…
Aug 29, 2026 · 7:06
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…
Aug 28, 2026 · 50:32
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…
Aug 27, 2026 · 25:51
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…
Aug 26, 2026 · 5:54
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…
Aug 25, 2026 · 14:18
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…
Aug 24, 2026 · 36:58
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…
Aug 23, 2026 · 6:05
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…
Aug 22, 2026 · 24:33
Hosted by Chris Beckett & Shane Ludtke , two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes.…
Aug 21, 2026 · 9:59
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…
Aug 20, 2026 · 1:02:03
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…
Aug 19, 2026 · 48:07
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…
Aug 18, 2026 · 38:18
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…
Aug 17, 2026 · 30:05
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…
Aug 16, 2026 · 6:05
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…
Aug 15, 2026 · 7:46
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:…
Aug 14, 2026 · 59:06
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…
Aug 13, 2026 · 11:45
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…
Aug 12, 2026 · 8:11
Hosted by our Director, Avivah Yamani. Explore the August 2026 equatorial sky, from the Perseids and Milky Way to bright planets and the August 12 total solar eclipse. We've…
Aug 11, 2026 · 14:34
Hosted by Steve Nerlich. We are still out there. Dear Cheap Astronomy – Why do some space missions last so long? So, we're all familiar with the stories of the Mars rovers,…
Aug 10, 2026 · 33:59
http://www.astronomycast.com/archive/ From October 19, 2009. Hosted by: Fraser Cain ( @frasercain ) and Dr. Pamela L. Gay ( @CosmoQuest ) Every now and then, the Moon destroys…
Aug 9, 2026 · 6:05
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…
Aug 8, 2026 · 12:22
Hosted by Rob Sparks. The 10-year Legacy Survey of Space and Time has officially started, marking the beginning of a new era in astronomy and astrophysics. Over the next ten…
Aug 7, 2026 · 52:12
From July 15, 2026. Hosted by: Dr. Pamela L. Gay ( @CosmoQuest ) Our solar system readily provides us with free samples of other worlds in the form of meteorites. The trick comes…
Aug 6, 2026 · 27:49
Hosted by Chris Beckett & Shane Ludtke , two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes.…
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