The 365 Days of Astronomy
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.
info_outline
Deep Astronomy - The Largest Galaxy in the Universe: IC 1101
12/23/2025
Deep Astronomy - The Largest Galaxy in the Universe: IC 1101
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. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39489800
info_outline
Astronomy Cast Ep. 775: The Hydrogen 21-cm Line
12/22/2025
Astronomy Cast Ep. 775: The Hydrogen 21-cm Line
Hosted by: Fraser Cain ( ) and Dr. Pamela L. Gay ( ) 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 forbidden transition of Hydrogen has led to the mapping of galaxy rotation, a cool classroom application of quantum mechanics, and weirdly no Nobel prize. In this episode, Fraser and Pamela take a look at this line's out-of-proportion awesomeness! This show is supported through people like you on In this episode, we'd like to thank: Andrew Poelstra, BogieNet, Brian Cagle, Burry Gowen, David, David Rossetter, Ed, Gerhard Schwarzer, Jason Kwong, Jeanette Wink, Michael Purcell, Sergey Manouilov, Siggi Kemmler, Sérgio Sancevero We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39479500
info_outline
Travelers in the Night Eps. 359E & 360E: One in 100,000 & Finding Spacerocks
12/21/2025
Travelers in the Night Eps. 359E & 360E: One in 100,000 & Finding Spacerocks
Dr. Al Grauer hosts. Dr. Albert D. Grauer ( ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. From October 2025. Today's 2 topics: - Friday the 13th appears to continue to be a lucky day for the human race. When astronomers first discovered Apophis in 2004 it appeared possible that this 3 million ton, 1,200 foot diameter asteroid traveling at 8 mi/s could impact our planet creating a crater a several miles diameter and more than a half mile deep. Additional observations over the years have eliminated this possibility as Apophis streaks by closer than the communications satellites on that lucky Friday the 13th. Further, current calculations have reduced the chances of Apophis colliding with Earth in the next 100 years to about one in 100,000. However, over the millennia Apophis is likely to strike the Earth as does one it's size once every 100,000 years or so. - Finding a meteorite that has traveled billions of miles through space to reach it's present location is exciting. It might even be worth real money. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39463200
info_outline
Astroman - Tips for Effective Science Communication
12/20/2025
Astroman - Tips for Effective Science Communication
Episode 12. “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 CL 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: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39463070
info_outline
EVSN - Asteroid Destruction, Brown Dwarf Formation & Getting Science From Dust
12/19/2025
EVSN - Asteroid Destruction, Brown Dwarf Formation & Getting Science From Dust
From February 11, 2020. Today’s show starts with a mighty YORP. It turns out the YORP effect may spin asteroids to death in dying star systems. We also look at how the formations of giant planets and brown dwarf stars differ, and a new way to get science from dust. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39463055
info_outline
Actual Astronomy - PiFinder
12/18/2025
Actual Astronomy - PiFinder
Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan. Today we have a guest joining us, Richard Wolf-Jacobson who is the founder of BB Labs/ PiFinder which is a new type of finder device. Before we get going Richard, can you tell us about where you are / observe / how you got started in Astronomy, what your interests are and what equipment you use? * What is a Pi Finder? * How does it work? / How do you set it up? * Do you need to attach anything to your AltAz or Dec Axis? * What is plate solving..isn’t that just for imagers? * How accurate is it? * What camera is in the device? Can someone do anything with the images? Do they get exported out to one’s phone? * How did you come up with the PiFinder * I see it is Open Source - what makes it open source? How can people modify it? Can someone roll their own? * What databases are in there? Can someone add their own? Can it interface with SkySafari or other softwares? * What formats does it come in or is it one size fits all? * Can one change from a back view to a side view to take it from a refractor to a dob. *Does it interface with Smart Phone? * How does it perform in the cold? * How small a scope can it go onto? * What are your future plans? We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39449560
info_outline
UNAWE Space Scoop - What's the Shape of a Supernova?
12/17/2025
UNAWE Space Scoop - What's the Shape of a Supernova?
Rewritten & recorded by your editor, Richard Drumm. When you imagine an explosion in space, a supernova is usually what first comes to mind. But astronomers are still quite puzzled by some of the details of these cosmic fireworks. The typical supernova we often picture is really the end of a massive star’s life. And a very dramatic ending at that! During its existence, a star keeps its spherical shape through a very delicate balance between: - the outward pressure created by the core’s nuclear heat, what we call the radiation pressure, and - the gravity that compresses the star toward its center of mass. We call this balance a state of hydrostatic equilibrium. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39433415
info_outline
Ask A Spaceman - Ep. 262: Does the Universe Have Extra Dimensions?
12/16/2025
Ask A Spaceman - Ep. 262: Does the Universe Have Extra Dimensions?
Large Extra Dimensions! Hosted by Dr. Paul M. Sutter. What do extra dimensions have to do with the strength of gravity? What is a tower of gravitons? How can we detect extra dimensions even if we can’t perceive them? I discuss these questions and more in today’s Ask a Spaceman! Support the show: All episodes: Watch on YouTube: Read a book: 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, 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, Steven W, Deb A, Michael J, Phillip L, Steven B, Mark R, Alan B, Craig B, Richard K, Stephen J, Joe R, David P, Justin, Tracy F, Ella F, Thomas K, James C, Syamkumar M, Homer V, Mark D, Bruce A, Tim Z, Linda C, The Tired Jedi, Lode D, Bob C, Red B, Stephen A, James R, Robert O, Allen E, Michael S, Reinaldo A, Sheryl, David W, Chris, Michael S, Erlend A, James D, Larry D, Karl W, Den K, Edward K, Craig M, Scott K, Vivek D, Barbara C, Brad, Azra K, Steve R, Koen G, and Narrative Dude! We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39420490
info_outline
Astronomy Cast Ep. 142: Plate Tectonics
12/15/2025
Astronomy Cast Ep. 142: Plate Tectonics
From June 15, 2009. The surface of the Earth feels solid under your feet, but you’re actually standing on a plate of the Earth’s crust. And that plate is slowly shifting across the surface of the Earth. Over geologic timescales, plate tectonics has totally resurfaced our planet, bringing continents together, and tearing them apart. We know we have plate tectonics here on Earth, but what about other worlds in the solar system? We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39406990
info_outline
Travelers in the Night Eps. 357E & 358E: 40 Years & Tiny Spacecraft
12/14/2025
Travelers in the Night Eps. 357E & 358E: 40 Years & Tiny Spacecraft
Dr. Al Grauer hosts. Dr. Albert D. Grauer ( ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. From October 2025. Today's 2 topics: - Looking at the stars on a clear dark night, far from the artificial air glow humanity creates, have you ever wondered what it would be like to travel in truly deep interstellar space? 40 years after their launches in 1977, your representatives, the twin Voyager 1 and Voyager 2 spacecraft are in the vast space between the stars in our Milky Way galaxy. Aboard each Voyager is a Golden Record time capsule which is expected to last billions of years. This message from all of humanity is inscribed with greetings from Earth as well as sounds, images, and a decoding key which will enable any intelligent aliens which find a Voyager to discover who made it and where it came from. - To reach the vicinity of the nearest star, 24 trillion miles away, in less than 20 years, an interstellar space probe would have to travel at a substantial fraction of the speed of light. Newton's laws of motion, published 300 years ago, predict that the greater the mass of an object the greater is the force required to increase its velocity. In order to alleviate the need for the virtually unaffordable amount of energy required to accelerate a normal sized spacecraft to a speed of 20% of the speed of light, the Breakthrough Starshot program has funded the creation of 'Sprite' , the world's smallest spacecraft. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39390735
info_outline
NOIRLab - An Extra Long Gamma Ray Burst
12/13/2025
NOIRLab - An Extra Long Gamma Ray Burst
Astronomers have observed the longest-ever gamma-ray burst — a powerful, extragalactic explosion that lasted over seven hours. Rapid follow-up observations with the U.S. Department of Energy-fabricated Dark Energy Camera and the International Gemini Observatory provided crucial information about the possible origin of this extraordinary event and the galaxy that hosts it. Bios: - Rob Sparks is in the Communications, Education and Engagement group at NSF’s NOIRLab in Tucson, Arizona. - Jonathan Carney is a graduate student at the University of North Carolina at Chapel Hill, where he studies time-domain astronomy with a focus on tidal disruption events. His research spans the full pipeline of transient discovery and characterization, from developing machine learning models for the forthcoming Argus Array to conducting follow-up observations with NOIRLab telescopes. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39390720
info_outline
EVSN - Never Trust a Volcano & Other Geology Tales
12/12/2025
EVSN - Never Trust a Volcano & Other Geology Tales
From December 3, 2025. The world we live on today has undergone dramatic change since it first formed, and time hasn't necessarily been kind. Earth has gained some weight (and a Moon) after a chance collision. A leaky gut led to some confusing internal structures. Here on the surface, mountains keep finding new ways to pop off and destroy surroundings. But scientists are helping us understand all these factors. Learn how in this episode of EVSN, and also hear about our latest tales from the launch pad. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39364495
info_outline
Guide To Space - NASA Wants To Bring A Chunk Of Comet Back To Earth. Collaboration with Everyday Astronaut
12/11/2025
Guide To Space - NASA Wants To Bring A Chunk Of Comet Back To Earth. Collaboration with Everyday Astronaut
Hosted by Fraser Cain & Tim Dodd. From Feb 27, 2018. NASA is going to decide between a comet sample return mission or a helicopter on Titan. Which mission should it be? [Spoiler alert! NASA went with the Dragonfly mission.] Tim’s video: We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39364475
info_outline
Cheap Astronomy - Implausible Engineering, Episode 6: Lasting the Distance
12/10/2025
Cheap Astronomy - Implausible Engineering, Episode 6: Lasting the Distance
Hosted by Steve Nerlich. Immortality is hard work. Episode 6a: Staying Switched On It’s difficult to achieve immortality unless you also achieve invulnerability, since even if you don’t age or get sick you can still die from a natural disaster, or a murder, or whatever. Indeed, the longer you live the more likely some unexpected calamity may come your way. So, if your only immortal up until the point that something goes wrong and you die, then you’re not really immortal. Episode 6b: Hopping Universes. The day is coming when our Universe starts winding down towards heat death and our by-then close-to- immortal descendants will need to find a fresh young Universe to continue in. After all, here we living in a Universe that apparently popped of nowhere, quite literally, since the whole idea of a Universe is that it contains spacetime, so whatever nothingness that it did pop out of had neither space nor time dimensions. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39332125
info_outline
Deep Astronomy - A Glimpse Into The Early Universe Ep. 1
12/09/2025
Deep Astronomy - A Glimpse Into The Early Universe Ep. 1
Hosted by Tony Darnell. From Feb 6, 2025. JWST Discovers Planet Formation in the Conditions of the Early Universe! Journey with the James Webb Space Telescope to the star cluster NGC 346, a vibrant region of star birth and potential planet formation. This image offers a glimpse into the early universe, where stars formed under conditions very different from our own Milky Way. See how JWST's infrared vision reveals protoplanetary disks - swirling clouds of gas and dust around young stars - defying previous models of planet formation. Witness the evidence that planets can form in environments with fewer heavy elements than previously thought, expanding our understanding of how planetary systems like our own come to be. This stunning image, a mosaic of data collected by JWST's NIRCam instrument, represents a breakthrough in our understanding of the cosmos. Discover the potential for new worlds and the endless possibilities that await as we continue to explore the universe. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39332090
info_outline
Astronomy Cast Ep. 774: How Does Bad Science Happen?
12/08/2025
Astronomy Cast Ep. 774: How Does Bad Science Happen?
Hosted by: Fraser Cain and Dr. Pamela L. Gay. Streamed live on Nov 8, 2025. Scientific expertise is under attack on all fronts with concerns coming from politicians and the public. While most of this is unwarranted and politically motivated, there can be germ of truth. Bad science does happen, but how? How is it that papers that very few believe still make it through peer review and to publication? Why do professors at prominent universities get quoted saying things that seem to be fiction? In this episode, we consider the case for letting potentially impossible things make it to publication. This show is supported through people like you on In this episode, we'd like to thank: Andrew Poelstra, BogieNet, Brian Cagle, Burry Gowen, David, David Rossetter, Ed, Gerhard Schwarzer, Jason Kwong, Jeanette Wink, Michael Purcell, Sergey Manouilov, Siggi Kemmler, Sérgio Sancevero We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39307675
info_outline
Travelers in the Night Eps. 355E & 356E: Moon Water & Interplanetary Sand Traps
12/07/2025
Travelers in the Night Eps. 355E & 356E: Moon Water & Interplanetary Sand Traps
Dr. Al Grauer hosts. Dr. Albert D. Grauer ( ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. From September 2025. Today's 2 topics: - The lunar roving, battery powered, 4 wheel drive "Moon Buggy" allowed astronauts on Apollo 15, 16, and 17 to travel 8 mph on the lunar surface with a maximum range of approximately 4.7 mi. Some of the rocks that these space travelers brought back, from the tiny area they were able to visit on the Moon, contained volcanic glass beads with trace amounts of trapped water inside of them. - When the Japanese spacecraft Hayabusa visited the near Earth asteroid Itokawa in 2005 it found this 2000 foot by 800 foot elliptical world to have a variety of surface features. Instead of being a solid object like some asteroids, Itokawa is a rubble pile of boulders and pebbles held together by its tiny gravity. The total volume of pebbles seems to be comparable to the volume of large rocks and boulders which make up Itokawa , however, the depths of the pebbles or their concentration in the center remains unknown. Given this uncertainty, this asteroid appears to be made up of a million times more small particles than larger ones. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39298310
info_outline
December Sky Guide for Equatorial Region
12/06/2025
December Sky Guide for Equatorial Region
Hosted by our Director, Avivah Yamani. Today we have sky guide for the rest of December 2025, specifically curated for observers in the equatorial region with Indonesia as the based of location. While the recent dazzling Full Moon and Supermoon gave us a brilliant start, the celestial show continues with powerful planetary meetings and the most spectacular meteor shower of the year! We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39297690
info_outline
EVSN - Cotton Candy Super Puffs, the Warped Milky Way Galaxy & Conference Chaos
12/05/2025
EVSN - Cotton Candy Super Puffs, the Warped Milky Way Galaxy & Conference Chaos
From March 3, 2020. Hosted by Suzie Murph. This week’s news is weird. Cotton candy exoplanets called “SuperPuffs” may have rings, the Milky Way Galaxy may have been warped by a major collision, and conference COVID cancellations and uncertainty are overwhelming the news this week. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39259340
info_outline
Actual Astronomy - Observer's Guide - December
12/04/2025
Actual Astronomy - Observer's Guide - December
Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan. - Dec 3-4 – Moon 0.8° N of Pleiades (Occults stars in Virginia) Carbon Star U Lyr best tonight - Dec 4 – Full Moon in Taurus - Dec 7 – Jupiter 4° South of Moon Mercury Greatest Elongation 21° from Sun in morning Sky Endymion sunset rays visible on Moon - Dec 7-8 Moon and M44 - Dec 8 – 16 Psyche at Opposition 9.4 magnitude Asteroid 16 Psyche is a large, metal-rich asteroid, thought to be the exposed core of a protoplanet, located between Mars and Jupiter. It is composed of a high concentration of nickel and iron and is estimated to be worth an astronomical amount of metal. Scientists are studying it to learn more about the formation of Earth’s core and other rocky planets, and a NASA mission is currently underway to explore it. - Dec 10 – Moon Occults Regulus 2am - Dec 13 – Geminid Meteor Shower – up to 150 ZHR on morning of the 14th. - Dec 21 – Ursid meteor Shower – 10 zhr - Dec 22 Moon Occults Pluto at 4pm EST - Dec 23 Carbon Star Z Psc best tonight - Dec 24 Comet 24P Schaumasse visible tonight Marie called it again…we have yet another bright comet…8.5 magnitude by mid month, moon leaves sky on 11/12th - Dec 25 Saturn Ring Tilt -0.76 - Dec 26 – Lunar X near crater Werner visible - Dec 27 — Saturn, Neptune and Moon congregate in evening sky. Lunar Straight Wall visible - Dec 29 – Jeweled Handle Visible On Moon - Dec 31 – Moon 0.9° N of Pleiades Carbon Star T Lyn best tonight We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39259300
info_outline
Awesome Astronomy - December Part 1: Icy Telescopes & Martian Lightning
12/03/2025
Awesome Astronomy - December Part 1: Icy Telescopes & Martian Lightning
Paul Hill and Dr. Jenifer “Dr. Dust” Millard host. Damien Phillips, John Wildridge and Dustin Ruoff produce. This episode it is a new bananza with discussion of the Thirty Metre Telescope, shenanigans on Mars, asymmetrical supernovae and more trouble in the world of cosmology. There is a Xmas Telescope buying guide as well as our monthly skyguide! We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39232130
info_outline
Ask A Spaceman - Ep. 261: What are Black Dwarfs?
12/02/2025
Ask A Spaceman - Ep. 261: What are Black Dwarfs?
What happens to a white dwarf when it cools off? How long does it take? Do they just stay black forever, or will something more interesting happen to them someday? I discuss these questions and more in today’s Ask a Spaceman! Support the show: All episodes: Watch on YouTube: Read a book: 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, 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, Steven W, Deb A, Michael J, Phillip L, Steven B, Mark R, Alan B, Craig B, Richard K, Stephen J, Joe R, David P, Justin, Tracy F, Ella F, Thomas K, James C, Syamkumar M, Homer V, Mark D, Bruce A, Tim Z, Linda C, The Tired Jedi, Lode D, Bob C, Red B, Stephen A, James R, Robert O, Allen E, Michael S, Reinaldo A, Sheryl, David W, Chris, Michael S, Erlend A, James D, Larry D, Karl W, Den K, Edward K, Craig M, Scott K, Vivek D, Barbara C, Brad, Azra K, Steve R, Koen G, and Narrative Dude! 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: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39232100
info_outline
Astronomy Cast Ep. 773: What Would You Do With $1 Billion For Astronomy?
12/01/2025
Astronomy Cast Ep. 773: What Would You Do With $1 Billion For Astronomy?
Hosted by: Fraser Cain and Dr. Pamela L. Gay. Streamed live on Nov 9, 2025. We are powerless fans of space exploration. But what if some fool gave us the authority and funding to make our space dreams a reality? Someone asked us what we’d do with a billion dollars. What missions? Which telescopes? But what if we had more? 100 Billion! A trillion! All the monies! You keep asking, and this week we answer you! Come hear what Fraser and Pamela would do if they were given complete control over $1billion that had to be used for astronomy. This show is supported through people like you on Patreon.com/AstronomyCast In this episode, we'd like to thank: Andrew Poelstra, BogieNet, Brian Cagle, Burry Gowen, David, David Rossetter, Ed, Gerhard Schwarzer, Jason Kwong, Jeanette Wink, Michael Purcell, Sergey Manouilov, Siggi Kemmler, Sérgio Sancevero We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39202680
info_outline
Travelers in the Night Eps. 353E & 354E: Peaceful Star & Martian Debris
11/30/2025
Travelers in the Night Eps. 353E & 354E: Peaceful Star & Martian Debris
Dr. Al Grauer hosts. Dr. Albert D. Grauer ( ) is an observational asteroid hunting astronomer. Dr. Grauer retired from the University of Arkansas at Little Rock in 2006. From September 2025. Today's 2 topics: - The Sun is our very own well behaved star. It rises and sets in our sky every day and powers and makes possible all life forms on planet Earth. A new appreciation for our Sun is growing as we learn more about other suns and their families of planets. The Trappist-1 system of 7 planets orbits a dim M type red dwarf star about 40 light years away in the constellation of Aquarius. Recently, Dr. Manasvi Lingam and Dr. Abraham Loeb of Harvard University have calculated the likelihood that planets orbiting red dwarf stars are able to possess an atmosphere conducive to life. - Martian Trojan asteroids have stable orbits around the Sun, leading and trailing the red planet by 60 degrees, where the Sun's and Mars's gravity are balanced. For some time astronomers have considered it unlikely that these asteroids wandered in from the asteroid belt. Recently, Dr. David Polishook of the Weizmann Institute of Science in Israel led a group of researchers who published a paper in the journal Nature Astronomy which sets forth evidence that a group of 7 Martian Trojan Asteroids were blasted from the Martian surface when a large asteroid impacted the red planet early in the history of the solar system. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39188640
info_outline
Folklore - Tokuzou's Star: When the Northern Star Moved
11/29/2025
Folklore - Tokuzou's Star: When the Northern Star Moved
Hosted by our Director, Avivah Yamani. In Japanese folklore Tokuzou was a great mariner from Osaka who relied on Polaris (as we europeans call it), the North Star for navigation at sea. Then one night his wife saw that it had shifted out of place and she was afraid that her husband wouldn’t be able to find his way back home! We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39188615
info_outline
EVSN - Another Potential Dark Matter Particle Isn’t Found
11/28/2025
EVSN - Another Potential Dark Matter Particle Isn’t Found
From April 21, 2021. Researchers looked for a slowdown in black hole rotational speeds due to the collection of ultralight bosons, but they found nothing, eliminating the hypothetical particle from the list of possible dark matter particles. Plus, neutrino hunting, neutron stars, and a space hurricane. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39188595
info_outline
H’ad Astra Historia - The 2026 Doggett Prize, Part 1
11/27/2025
H’ad Astra Historia - The 2026 Doggett Prize, Part 1
Episode 207. 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 our interview, we’ll hear about his background and explore some of his many achievements. This is the first of multiple episodes presenting our interview with him. 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 music: "Frost Waltz" Kevin MacLeod (incompetech.com), licensed under creative commons: by attribution 4.0 license (http://creativecommons.org/licenses/by/4.0/) Podcaster: 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: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39174320
info_outline
Cheap Astronomy - Implausible Engineering: Building A Telescope Big Enough To See Aliens
11/26/2025
Cheap Astronomy - Implausible Engineering: Building A Telescope Big Enough To See Aliens
Hosted by Steve Nerlich. From October 14, 2024. Episode 5 — Too much is never enough. Cheap Astronomy's vision for space exploration: build whopping-big telescopes and send the robots. We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39161080
info_outline
Deep Astronomy - The Amazing Orion Nebula As Seen By Hubble & Spitzer Space Telescope
11/25/2025
Deep Astronomy - The Amazing Orion Nebula As Seen By Hubble & Spitzer Space Telescope
From Jan 12, 2018. Hosted by Tony Darnell. Like this content? Please consider becoming a patron: On January 11, 2017 the Spitzer and Hubble Space Telescope missions released an amazing flythrough of the Orion Nebula, or M42. Never before have we had such a detailed look at this naked eye object in two wavelengths. Using actual scientific imagery and other data, combined with Hollywood techniques, a team at the Space Telescope Science Institute in Baltimore, and the Caltech/Infrared Processing and Analysis Center (IPAC) in Pasadena, California, has created the best and most detailed multi-wavelength visualization yet of this photogenic nebula. [Editor’s note: You really do want to click on the YouTube link above.] We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39161070
info_outline
Astronomy Cast Ep. 772: 2025 Gift Guide
11/24/2025
Astronomy Cast Ep. 772: 2025 Gift Guide
Hosted by: Fraser Cain and Dr. Pamela L. Gay. Streamed live on Nov 9, 2025. It’s time once again for our annual gift giving guide. We’ve got recommendations for books, movies, TV shows, games and of course astronomy gear to satisfy the space nerds in your family. The Christmas season is almost upon us, and with it comes excuses to inject science into the lives of those you love... or ask for them to give you that book, lens, or art print you already know you'll love. In this episode, Fraser and Pamela share the things they think would make good gifts for nerds like us. This show is supported through people like you on In this episode, we'd like to thank: Andrew Poelstra, BogieNet, Brian Cagle, Burry Gowen, David, David Rossetter, Ed, Gerhard Schwarzer, Jason Kwong, Jeanette Wink, Michael Purcell, Sergey Manouilov, Siggi Kemmler, Sérgio Sancevero We've added a new way to donate to 365 Days of Astronomy to support editing, hosting, and production costs. Just visit: 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 for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just !) ------------------------------------ The 365 Days of Astronomy Podcast is produced by the Planetary Science Institute. Visit us on the web at or email us at .
/episode/index/show/astro365/id/39131670