

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.
Episodes
Mentioned books

Aug 28, 2025 • 8min
Space Stories - Galaxies Don’t Crash, They Remix
Hosted by our Director, Avivah Yamani. Today's podcast guides you through the slow-motion meeting of the Milky Way and Andromeda. Learn why stars mostly miss each other, how gravity sculpts tidal tails, and how colliding gas and dust spark starbursts—turning two spirals into one remixed galaxy. Epic? Yes. Doomsday? Nope. 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.

Aug 27, 2025 • 10min
Guide to Space - An Intermediate Mass Black Hole Found in the Milky Way. 100,000 Times the Mass of the Sun
Astronomers have made a groundbreaking discovery of a massive black hole in the Milky Way, weighing 100,000 times the mass of the Sun. This revelation sheds light on intermediate mass black holes, bridging the gap between stellar and supermassive variants. Evidence from gravitational waves enhances our understanding of how these colossal entities form, particularly in relation to supermassive black holes. Listeners are actively encouraged to engage in naming this newfound black hole, setting the stage for fun and educational future discussions.

Aug 26, 2025 • 10min
Deep Astronomy - A Journey into a Black Hole Collision
https://www.youtube.com/watch?v=zIfHgFLe4_U Hosted by Tony Darnell. From Apr 26, 2016. Black holes have been largely theoretical until the LIGO observations announced earlier this year. Thanks to those observations, we now have another way to study and observe these amazing celestial objects. Original Music by Mark C. Petersen, Loch Ness Productions http://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.

Aug 25, 2025 • 35min
Astronomy Cast Ep. 84: Getting Around the Solar System
From April 14, 2008. Have you ever wondered what it takes to get a spacecraft off the Earth and into space. And how managers at NASA can actually navigate a spacecraft to another planet? And how does a gravity assist work? And how do they get things into orbit? And how do they land? So many questions… 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.

Aug 24, 2025 • 6min
Travelers in the Night Eps. 325 & 326: Marrakech & Asteroids 2016
Explore the breathtaking Atlas Mountains in Morocco, where dark skies and clear weather make for perfect asteroid hunting conditions. Discover how the Morocco Oukaïmeden Sky Survey, a collaboration among amateur astronomers from Morocco, France, and Switzerland, achieves professional-quality results. The year 2016 marked a record in asteroid discoveries, with nearly 1,900 new Earth-approaching objects identified, showcasing the relentless efforts of dedicated astronomers. Tune in for fascinating insights and stories from the world of asteroid detection!

Aug 23, 2025 • 38min
The Cosmic Savannah - Ep. 73: Burping Black Holes
Hosted by Dr. Jacinta Delhaize, Dr. Tshiamiso Makwela & Dr. Daniel Cunnama. In this episode of The Cosmic Savannah, our hosts speak with Dr. Eli Kasai from the University of Namibia. Dr. Kasai shares his inspiring journey of establishing the astronomy department at the University of Namibia, and his work on blazars using SALT and the Cherenkov Telescope Array. He also discusses the exciting African Millimetre Telescope project and Namibia's active role in the global astrophysics community, along with efforts to engage the public through the mobile planetarium. 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.

Aug 22, 2025 • 11min
EVSN - Stars and Planets May Grow Up Together!
From October 8, 2020. New images taken with the ALMA Observatory show a young proto-stellar disk with the rings and gaps of planetary formation growing together, once again challenging our preconceptions. And other research into stellar formation adds heavy metals to the mix to match models to observations. Plus, an old, metal-poor galaxy halo. 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.

Aug 21, 2025 • 46min
Actual Astronomy - Listener Emails
Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan. actualastronomy@gmail.com The Actual Astronomy Podcast presents Listener Emails. In this episode we talk & read several listener emails including Observing Saturn, Equipment reports, telescope making, public outreach, a supernova photo and more! Our emailers: - Leonid - Frank Dempsy of Pickering, Ontario - Bill - Richard N. - Mike Peoples 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.

Aug 20, 2025 • 13min
Awesome Astronomy - How Realistic is a Space Elevator?
Imagine riding an elevator into space instead of blasting off in a rocket! The hosts explore the science and engineering behind this ambitious concept. They tackle the immense challenges of construction, from the materials needed to withstand extreme conditions to the logistics of such a massive project. The risks of space debris and potential cable failures add to the complexity. Despite the hurdles, the discussion inspires a forward-thinking view on the future of space exploration!

Aug 19, 2025 • 27min
Ask A Spaceman Ep. 254: How Do Variable Stars, You Know, Vary?
What powers Cepheid variable stars? What about Mira variables and pulsating stars? And are there variable stars that don’t actually vary at all? 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, Duncan M, Corey D, Michael P, Naila, Sam R, John S, 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, Michael B, Aileen G, Don T, Steven W, Deborah A, Michael J, Phillip L, Mark R, Alan B, Craig B, Mark F, Richard K, Stace J, Stephen J, Joe R, David P, Justin, Robert B, Sean M, Tracy F, Ella F, Thomas K, James C, Syamkumar M, Homer V, Mark D, Bruce A, Tim Z, Linda C, The Tired Jedi, Gary K, David W, dhr18, Lode D, Bob C, Red C, Stephen A, James R, Robert O, Lynn D, Allen E, Michael S, Reinaldo A, Sheryl, David W, Chris, Michael S, Erlend A, James D, Larry D, Karl W, Den K, George B, Tom B, Edward K, Catherine B, John M, Craig M, Scott K, Vivek D, Barbara C, Brad, and Azra K! Hosted by Dr. Paul M. Sutter. 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.