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PODCAST

The 365 Days of Astronomy

365DaysOfAstronomy.org

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.

science astronomy

All Episodes

13:08

NOIR Lab - Fast Spinning Asteroids From the Rubin...

The 365 Days of Astronomy ·

2026/01/10

As part of the NSF–DOE Vera C. Rubin Observatory First Look event in June 2025, Rubin announced that it had observed thousands of asteroids cruising about our Solar System, about 1,900 of which have been confirmed as never-before-seen. Within the flurry, a team of astronomers has discovered 19 super- and ultra-fast-rotating asteroids. One of these is the fastest-spinning asteroid larger than 500 meters (0.3 miles) ever found. In this podcast, Dr. Sarah Greenstreet discusses these fast spinning

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29:36

EVSN - When Science Results Rhyme: Exoplanets,...

The 365 Days of Astronomy ·

2026/01/09

From December 25, 2025. In this week's episode, we look at planets younger than fossils, celebrate relativity repeatedly working as expected, and peer at previously only theorized 1st generation stars using JWST. We celebrate the completion of the construction of the Nancy Grace Roman Space Telescope, and look in on all the recent launches. All this and more is coming to you right here, and right now! We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and

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06:20

January Sky Guide for Equatorial Region

The 365 Days of Astronomy ·

2026/01/08

Hosted by Avivah Yamani. January 2026 is a packed month for equatorial skywatchers! Catch the Quadrantid meteor shower peak on the new year and Jupiter steals the spotlight at opposition. 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

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49:54

Awesome Astronomy - Soundgarden Wins at Astrophysics

The 365 Days of Astronomy ·

2026/01/07

Paul Hill and Dr. Jenifer "Dr. Dust" Millard host. Damien Phillips, John Wildridge and Dustin Ruoff produce. So it turns out Soundgarden nailed astrophysics in 1994. We explore latest thinking on Little Red Dots, Globular Custers, oldest supernovae, No-ceans on Titan as well as our monthly skyguide and moon guide. 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

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32:08

Ask A Spaceman - Ep. 263: Does Free Will Exist?

The 365 Days of Astronomy ·

2026/01/06

What is causal determinism? What are some of the ways that physics can permit free will? What does emergence have to do with all of this? 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

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36:10

Astronomy Cast Ep. 777: The Eddington Limit

The 365 Days of Astronomy ·

2026/01/05

https://www.youtube.com/watch?v=uijiic8crBQ Hosted by: Fraser Cain (@frasercain ) and Dr. Pamela L. Gay (@CosmoQuest ) Streamed live on Dec 29, 2025. How big can a star get? This is a calculation made by one of the original pioneers of modern astronomy, Sir Arthur Eddington. And it's named after him, the Eddington Limit. Now, astronomers are finding examples of giant black holes early in the Universe, calling into question some of Eddington's assumptions. Let's explore this fascinating concept! Why

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06:05

Travelers in the Night Eps. 843 & 844: Possible...

The 365 Days of Astronomy ·

2026/01/04

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 April 2025. Today's 2 topics: - On 27 December 2024 the Atlas group in Chile discovered an object now known as 2024 YR4 which appeared to have a significant chance of impacting Earth 22 December of 2032. The most recent data indicates the chance that 2024 YR4 impact Earth is about 1 in

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54:28

Awesome Astronomy - December Part 2 Yeeting Your...

The 365 Days of Astronomy ·

2026/01/03

Paul Hill & Dr. Jenifer "Dr. Dust" Millard host. Damien Phillips, John Wildridge and Dustin Ruoff produce. In this chatty news episode 164 we chat about more Artemis mission shenanigans and how the Russians have wrecked their only human rated launch pad. 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

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10:53

EVSN - Double Dose of Planetary Pandemonium

The 365 Days of Astronomy ·

2026/01/02

From October 9, 2020. Join us as we take a look back to two weeks' worth of planetary stories, including solar system research on a binary trans-Neptunian object, diamonds in meteorites, the stratification of Titan's lakes, and how Jupiter affected Venus' habitability. Plus we go farther into space and see how super flares affect the chances for life on exoplanets and find an exoplanet with vaporized metal in its atmosphere. We've added a new way to donate to 365 Days of Astronomy to support

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39:31

Actual Astronomy - Observer's Calendar for January

The 365 Days of Astronomy ·

2026/01/01

Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan. actualastronomy@gmail.com This month in episode 516 we talk about the many things to see in the night sky including, carbon stars, double stars, 24P Schaumasse is a Comet that just cracks 8th magnitude making it visible in binoculars. We also detail how people can explore Jupiter through a telescope followed by many NGC and Messier Objects you can see in the winter sky. Jan 1 - Struve 627 in Orion Colorful Double

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29:57

Had Astra Historia - The 2026 Doggett Prize, Part 3

The 365 Days of Astronomy ·

2025/12/31

Episode 209. Today's guest: Professor Thomas Hockey, with the University of Northern Iowa, is the recipient of HAD's 2026 LeRoy E. Doggett Prize, which is awarded biennially to an individual who has significantly influenced the field of the history of astronomy by a career-long effort. In this episode, we'll not only conclude our discussion of his most recent book, but we'll also talk about some rather fun and interesting topics. H'ad astra historia is the official podcast for the Historical

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37:14

Had Astra Historia - The 2026 Doggett Prize, Part 2

The 365 Days of Astronomy ·

2025/12/30

Episode 208. Today's guest: Professor Thomas Hockey, with the University of Northern Iowa, is the recipient of HAD's 2026 LeRoy E. Doggett Prize, which is awarded biennially to an individual who has significantly influenced the field of the history of astronomy by a career-long effort. In today's episode, our focus is mainly on his more significant books. H'ad astra historia is the official podcast for the Historical Astronomy Division of the American Astronomical Society. We're here to share

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31:03

Astronomy Cast Ep. 776: The Matter - Antimatter...

The 365 Days of Astronomy ·

2025/12/29

https://www.youtube.com/watch?v=kGY4t683Xro Hosted by: Fraser Cain ( @frasercain ) and Dr. Pamela L. Gay ( @CosmoQuest ) Streamed live on Dec 22, 2025. Shortly after the big bang there were almost exactly the same amounts of matter and antimatter in the Universe, but there was just enough of a difference that we live in a matter-dominated Universe. But it didn't have to be that way! Explaining this mystery has been one of the great mysteries in astronomy, and today we'll see if there's been any

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06:05

Travelers in the Night Eps. 841 & 842: Moon Fragment...

The 365 Days of Astronomy ·

2025/12/28

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 2025. Today's 2 topics: - Astronomers have yet to discover any long lasting natural object, beside our Moon, which orbits the Earth, however, occasionally, a small space rock enters into a temporary dance with our home planet. - My Catalina Sky Survey teammate Greg Leonard was asteroid

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35:05

The Cosmic Savannah - Ep. 77: Troublesome Inkathazo &...

The 365 Days of Astronomy ·

2025/12/27

Hosted by Dr. Jacinta Delhaize, Dr. Tshiamiso Makwela & Dr. Daniel Cunnama. In this "mid-season special" episode, we introduce you to an extraordinary giant radio galaxy nicknamed "Inkathazo", meaning 'trouble' in isiXhosa and isiZulu. We speak with Kathleen Charlton, a Master's student from the University of Cape Town, about the discovery of Inkathazo and her newly published work on the topic. Kathleen spoke with us from the University of Oxford, where she was working with team members from the

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22:25

EVSN - Six-Exoplanet System in Resonance, Challenges...

The 365 Days of Astronomy ·

2025/12/26

From January 27, 2021. It's a day ending in 'y', and planetary formation theories are once again being challenged. This time the challenge comes from a six-planet system with five planets in resonance. Plus a cloudless Jupiter, TRAPPIST-1, volcanoes, and some science of the weird. 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

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19:52

Space Stories - Second Landing

The 365 Days of Astronomy ·

2025/12/25

Hosted by Dr. Pamela Gay. A gentle fancy for the Christmas Season—an oft-told tale with a wistful twistful of Something that left the Earth with a wing and a prayer. Earlier today, I had the stark realization that at the core of many Christmas stories is a core of sorrow or longing that must somehow be transformed into joy. Scrouge must learn charity. Ralphie longs for a bb gun and is betrayed by his joy. George is on the brink of suicide when his Guardian Angel intercedes. John McClane just needs

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05:48

Space Stories - Solstice: When the Sun Stands Still

The 365 Days of Astronomy ·

2025/12/24

Hosted by our Director, Avivah Yamani! What does "solstice" really mean? In this episode, we unpack the Sun's yearly turning point, the seasonal flip between hemispheres, and the ancient sky-architecture of Stonehenge, from June solstice sunrise to December solstice sunset. 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

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07:43

Deep Astronomy - The Largest Galaxy in the Universe:...

The 365 Days of Astronomy ·

2025/12/23

https://www.youtube.com/watch?v=UE8yHySiJ4A Hosted by Tony Darnell. From Sep 21, 2012. This video was done by request from a Space Fan. Hope it's what you had in mind. IC 1101 is over one billion light years away in the constellation Virgo, just over the border from Serpens. https://en.wikipedia.org/wiki/IC_1101 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

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35:03

Astronomy Cast Ep. 775: The Hydrogen 21-cm Line

The 365 Days of Astronomy ·

2025/12/22

https://www.youtube.com/watch?v=2uvcumUc6Gc Hosted by: Fraser Cain ( @frasercain ) and Dr. Pamela L. Gay ( @CosmoQuest ) Streamed live on Dec 15, 2025. Atomic hydrogen is the raw material for stars, but there's a problem. It's cold & dark, but it can do a very rare trick, releasing a photon in a very specific wavelength, known as the 21 centimeter line. And thanks to this wavelength astronomers have mapped out star forming regions across the Milky Way, the Universe and into the Dark Ages! This

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