

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

Jul 2, 2025 • 1h 35min
Awesome Astronomy - Vera Rubin, Welsh Satellites and LIGO Disaster - July Part 1
Paul Hill and Dr. Jenifer “Dr. Dust” Millard host. Damien Phillips, John Wildridge and Dustin Ruoff produce. Brace yourselves! This is the longest podcast that 365 Days has ever had! 1 hour 34 minutes! A bumper episode or is that a Jumper episode if Jeni has her way. Paul has new scope and Jeni has been seeing the Sun. We have terrible news from LIGO, the end of Milkomeda, Light pollution paradox, Vera Rubin first light, a new satellite from Wales, spaceX kablooie, leaks on the ISS and of course the usual skyguide and emails! Phew! 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.

Jul 1, 2025 • 7min
UNAWE Space Scoop - Tiny Black Holes Have Big Superpowers
Black holes come in many sizes. Small, medium, large & extra large. The size of a black hole mostly depends on how massive the star was before it ran out of fuel, exploded as a supernova and collapsed under its own extreme gravity. The more massive the black hole, the stronger and larger its effect on the fabric of space and time. Here’s the new bit! In a recent study, astronomers found that even tiny black holes have immense power to shape their part of the galaxy. Far more than previously thought. Black holes can rip apart a star that comes too close by. Even the tiniest black holes, known as stellar-mass black holes can do this. 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.

Jun 30, 2025 • 31min
Astronomy Cast Ep. 761: It's Here! The Vera Rubin Observatory
https://www.youtube.com/watch?v=LVlbMsEpr8Y Hosted by: Fraser Cain and Dr. Pamela L. Gay Streamed live June 25, 2025. The time has come. The mighty Vera Rubin Observatory has finally come on line and delivered its “first light” images. And by Pamela’s rules that means we get to talk about it! So let’s do that! After decades of waiting, we have images from Vera Rubin Observatory! SUPPORTED BY YOU This Episode is made possible thanks to our Patrons on Patreon. Join at the Galaxy Group level or higher to be listed in our YouTube videos. Thanks to: BogieNet, Stephen Vei, Jeanette Wink, Siggi Kemmler, Andrew Poelstra, Brian Cagle, David Truog, Ed, David, Gerhard Schwarzer, Sergio Sancevero, Sergey Manouilov, Burry Gowen, David Rossetter, Michael Purcell, Jason Kwong 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.

Jun 29, 2025 • 6min
Travelers in the Night Eps. 323 & 324: Big Splash & Newborn Planets
What happens when an asteroid hits a large body of water? A team of scientists delves into this question, modeling the impact and discovering that it primarily affects the immediate area, unlike underwater landslides that can trigger tsunamis. Meanwhile, the ALMA radio telescope peers into the protoplanetary disk around a young star, revealing insights into planet formation 400 light years away. Tune in for fascinating revelations about cosmic collisions and the origins of new worlds!

Jun 28, 2025 • 1h 11min
Cosmic Savannah Ep. 71: The Dark Side of the Universe
Hosted by Dr. Jacinta Delhaize, Dr. Tshiamiso Makwela & Dr. Daniel Cunnama. In this milestone episode of The Cosmic Savannah, hosts Tshiamiso, Jacinta and Dan celebrate the start of Season Six and the podcast’s fifth anniversary. They engage in an enlightening discussion with Associate Professor Renée Hložek from the Dunlap Institute, focusing on her research in dark matter, dark energy, and the cosmic microwave background. Highlights include the significance of science communication, diversity in STEM, and Dr. Hložek’s involvement with the Vera C. Rubin Observatory. Join us once again in this 6th Season of The Cosmic Savannah and let us take you on a safari through the skies! Story Collider Podcast Episode: https://www.storycollider.org/stories/2016/1/1/renee-hlozek-who-looks-like-a-scientist 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.

Jun 27, 2025 • 39min
EVSN - When the Universe Attacks
From June 18, 2025. In this episode we celebrate the 75th anniversary of the Fermi Paradox by looking at a bunch of science capable of preventing and destroying civilizations. We also review our latest not-so-great attempts to land on the moon and launch a rocket that (if it worked) could carry us to Mars. 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.

Jun 26, 2025 • 51min
H’ad Astra Historia - Ep. 205 – Memories of Ed
Today Historical Astronomy Division, https://had.aas.org/, honors the late Dr. Edward C Stone with an episode of remembrances by his colleagues, friends, & family. Among his career achievements, he led NASA’s Voyager planetary-to-interstellar mission for 50 years as Project Scientist, from concept in 1972 through his retirement in 2022. Dr. Edward C Stone who passed away one year ago this month on June 9, 2024. During his 60-year career with JPL-Caltech (that included 10 years as JPL Director) Dr. Stone steered NASA’s Voyager planetary-to-interstellar mission for 50 years as Project Scientist, from concept in 1972 through his retirement in 2022. He “was known for his steady leadership, consensus building, and enthusiasm for engaging the public in science. He left a deep impact on the space community.” 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. Podcaster: Loretta Cannon (an AAS affiliate via Rose City Astronomers) is a science-and-word-nerd who really likes the stars. She quite enjoys working as HAD’s podcaster, bringing astronomy stories to you. Podcast music: "Frost Waltz" Kevin MacLeod (incompetech.com), licensed under creative commons: by attribution 4.0 license (http://creativecommons.org/licenses/by/4.0/) 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.

Jun 25, 2025 • 15min
Cheap Astronomy - Dear CA #120: Different Perspectives
Hosted by Steve Nerlich. Looking askance… Dear Cheap Astronomy – have we got any spacecraft on the other side of the Sun? Well, yes and no. Nearly all our spacecraft orbit the Sun – since they are either orbiting Earth or another planet or are touring the asteroid belt – and hence they’ve all been around the back of the Sun at one time another. The only spacecraft we don’t have orbiting the Sun are the ones on their way out of the Solar System – the Pioneers, the Voyagers and New Horizons, which have sufficient escape velocities to leave solar orbit. Dear Cheap Astronomy – Hubble crisis So there’s a crisis in cosmology apparently. Although, in most respects it’s just business as usual really. There aren’t many scientists who are overwhelmed by existential angst when they suddenly realize they don’t know everything. The crisis first started being talked around 2014 as it became apparent there consistent discrepancies in measurements of the Hubble constant, which is a measurement of how fast the Universe is expanding. 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.

Jun 24, 2025 • 7min
Exoplanet Radio Ep. 37: Osiris: The Exoplanet That Changed Everything
https://www.youtube.com/watch?v=Spo0dppFX9w Hosted by Tony Darnell. From Oct 2, 2023. The planet is HD 209458 b, and nicknamed "Osiris" after the Egyptian god of the underworld. Osiris is a fitting nickname for this planet, as it is a very hot and hostile world. HD 209458 b orbits its star very closely, and its surface temperature is estimated to be around 1,000 degrees Celsius. This makes it too hot for liquid water to exist on its surface, and it is unlikely to be habitable. Even so, this planet is remarkable in many ways. It occupies first place in a long list of discovery milestones. Get all episodes: https://exoplanetradio.com Music by Geodesium: https://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.

Jun 23, 2025 • 30min
Astronomy Cast Ep. 760: What to Look For This Summer
https://www.youtube.com/watch?v=9hG8Q3ZSX50 Hosted by: Fraser Cain and Dr. Pamela L. Gay Streamed live on Jun 16, 2025. It’s almost time for our annual summer hiatus, but before we go, we wanted to direct you towards all the fun and space stuff we’ll be enjoying this summer. We’ve got meteor showers, planets, rocket launches, TV shows, movies! Here’s what’s good. In a couple of weeks, we'll go on hiatus, but we want to make sure you are ready for stuff we can anticipate happening. SUPPORTED BY YOU This Episode is made possible thanks to our Patrons on Patreon. Join at the Galaxy Group level or higher to be listed in our YouTube videos. https://www.patreon.com/AstronomyCast Thanks to: BogieNet, Stephen Vei, Jeanette Wink, Siggi Kemmler, Andrew Poelstra, Brian Cagle, David Truog, Ed, David, Gerhard Schwarzer, Sergio Sancevero, Sergey Manouilov, Burry Gowen, David Rossetter, Michael Purcell, Jason Kwong 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.