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.

Cheap Astronomy - Dear CA Ep. 137: Space Missions 08/11/2026

Astronomy Cast Ep. 160: Eclipses 08/10/2026

Travelers in the Night Eps. 365E & 366E: Spotting Meteors & Mars Rocks 08/09/2026

Travelers in the Night Eps. 365E & 366E: Spotting Meteors & Mars Rocks 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 December 2025. Today's 2 topics: - Meteors, shooting stars, or falling stars are different names for the streaks of light in the night sky which are in reality the dying embers of tiny asteroids. These small interplanetary travelers were speeding along at between 7 and 44 miles per second when they entered the Earth's atmosphere. In space, they are called meteoroids and typically ranged in size from that of a grain of sand to perhaps ones as big as of a piece of driveway gravel. Large space pebbles can produce fireballs which are brighter than the planet Venus. - At about 2AM on July 18, 2011 several people in near Tata, Morocco saw a bright fireball which was described by one of them to be initially yellow, then turned green, and finally exploded into several pieces producing two sonic booms. In October of 2011 desert wandering nomads began finding very fresh looking dark fusion-crusted stones which were radioactively dated by Dr. John Duke of the University of Alberta to be less than 5 years old. In total 15-24 lbs of meteorites consistent with a very recent fall were found in a strewn field, were whisked away to receive high prices from collectors, and named after the town of Tissint, about 30 miles from their discovery location. 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/42362440

NOIRLab - The Start of the LSST 08/08/2026

NOIRLab - The Start of the LSST Hosted by Rob Sparks. The 10-year Legacy Survey of Space and Time has officially started, marking the beginning of a new era in astronomy and astrophysics. Over the next ten years, Rubin will relentlessly observe the entire southern sky every few nights to create an ultra-wide, ultra-high-definition time-lapse record of our Universe. This long-awaited milestone is the culmination of years of effort by thousands of people around the world. In this podcast, Dr. Christina Williams and Dr. Yumi Choi describe the LSST and its science goals as well as what they are most excited about researching with its groundbreaking data. Bios: - Rob Sparks is in the Communications, Education and Engagement group at NSF’s NOIRLab in Tucson, Arizona. - Dr. Yumi Choi is an Assistant Astronomer at NSF NOIRLab. Her research focuses on understanding the formation and evolution of nearby galaxies. Her primary work utilizes high-precision, multi-band photometry to analyze resolved stellar populations in those galaxies. Beyond my independent research programs, she is a dedicated member of the Rubin Observatory Community Science Team. Dr. Choi earned her PhD in Astronomy from the University of Washington in 2016. She subsequently held postdoctoral research positions at the University of Arizona’s Steward Observatory, Montana State University, and the Space Telescope Science Institute (STScI). Prior to her current appointment at NSF NOIRLab in 2023, she spent a year as an Assistant Researcher at the University of California, Berkeley. - Dr. Christina C. Williams is an Associate Astronomer at NSF NOIRLab in Tucson, Arizona And an Assistant Research Professor at University of Arizona and a member of the James Webb Space Telescope (JWST) NIRCam instrument and science teams. Her research focuses on high-redshift galaxies, galaxy evolution, and star formation in the early 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/42362425

EVSN - After Hours: Space Rocks Collected for Science With Guest Dr. Rhonda Stroud 08/07/2026

Actual Astronomy - The Observer’s Calendar for August 2026 08/06/2026

Actual Astronomy - The Observer’s Calendar for August 2026 Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes. Episode 545 of the Actual Astronomy podcast features hosts Chris and Shane discussing the observer’s calendar and planetary visibility for August 2026. Throughout the month, skywatchers can track key planetary positions, including Venus in the morning sky and Jupiter rising around 3:00 AM. Notable astronomical highlights include the Perseid meteor shower, multiple lunar feature viewings, and a partial lunar eclipse accompanying the Full Moon on August 28th. Planet Positions & Visibility: - Mercury: Very close to the Sun. Superior conjunction on the 27th. - Venus: In W, evening sky all month. - Mars: Rises at 3 AM in ENE. - Jupiter: Hidden behind the Sun at the start of Aug. Will rise around 5 AM by the end of month. - Saturn: Rises in E around midnight, transits around 5:00 AM, high in SSE at dawn. Astronomical Events by Date: - August 2 - Mercury at greatest morning elongation (19° from Sun) - Comet 10P/Tempel 2visible at 2:25 AM - Image for when moon leaves in second week of Aug. - August 3 - Lunar Feature (Mare Orientale) visible at 4:45 AM - Carbon star RS Cyg best in evening - August 5 - Last Quarter Moon at 22:21 ***August 5 Falcon 9 Upper Stage lunar impact anyone?*** - August 9 - Mars 4° SW of crescent Moon before dawn. - Star cluster NGC 6791 well placed this evening - August 10 - Moon at perigee - Wild Duck Cluster (M11) well placed this evening - August 11 - Mercury 2° South of Moon, just before dawn. - Globular clusters M22 and M28 well placed this evening - August 12 - New Moon at 13:37 — Partial solar eclipse for US east coast. - Perseid meteors (ZHR=100), late evening, but best seen after midnight - August 16 - Venus 9° W of Moon - August 19 - First Quarter Moon at 22:46 - Lunar feature Barrow Ray visible at 8:30 PM - Carbon star S Sct best in evening - August 23 - Lunar feature Jeweled Handle visible at 12:00 AM - Carbon star V CrB best in evening - August 26 - Crater Bailly visible at 10:00 PM - 57 Aql (colorful double star) visible - August 28th - Full Moon: Occurs at 0:19. - Partial (96%) Lunar Eclipse - 9 Metis at Opposition: Visible at magnitude m = 9.3 The asteroid was discovered on April 25, 1848, by Irish astronomer Andrew Graham. It was his only asteroid discovery and holds historical significance as the only asteroid ever discovered from an observatory in Ireland (the Markree Observatory). Scientists believe 9 Metis has a cataclysmic history. It is highly dense and rich in metals, leading researchers to conclude that it is likely the core remnant of an ancient, much larger primordial asteroid. This parent body was completely destroyed and stripped of its outer crust by a colossal space collision billions of years ago. 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/42320165

Ask A Spaceman Ep. 277: What’s It Like to Travel Near the Speed of Light? 08/05/2026

Ask A Spaceman Ep. 277: What’s It Like to Travel Near the Speed of Light? Life at lightspeed! Hosted by Dr. Paul M. Sutter. What does high-speed motion through the Universe do to your perspective? What is the Rindler horizon, and how does it appear? Would you get vaporized by a high-energy bath of radiation? 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, 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, Deb A, Michael J, Phillip L, Steven B, Mark R, Alan B, Craig B, Richard K, Joe R, David P, Justin, Tracy F, Thomas K, James C, Syamkumar M, Homer V, Mark D, Bruce A, Tim Z, Linda C, The Tired Jedi, Bob C, Stephen A, James R, Allen E, Michael S, Sheryl, David W, Chris, Michael S, Erlend A, James D, Karl W, Den K, Edward K, Scott K, Vivek D, M0PPET, Brad, Azra K, Steve R, M D Malahy, Brian O, Alonna M, Joseph B, and Anders J! 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/42320145

Awesome Astronomy - August Part 2: Jodrell Bank Murder Club 08/04/2026

Astronomy Cast Ep. 85: Detectors 08/03/2026

Travelers in the Night Eps. 363E & 364E: House Sized Space Rocks & Jupiter 08/02/2026

Travelers in the Night Eps. 363E & 364E: House Sized Space Rocks & Jupiter 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 November 2025. Today's 2 topics: - Throughout history small close approaching space rocks have been a part of our environment. Now, thanks to improved telescopes and cameras, asteroid hunters are routinely discovering these small asteroids as they pass closer than the Moon is to us. Since these tiny asteroids are only bright enough to detect for a few days out of their long, many month duration paths about the Sun, astronomers have had difficulty in determining how many of these small space rocks may exist in near Earth space. This effort received more emphasis when a house sized space rock exploded over Chelyabinsk, Russia in 2013 releasing about 10 times the energy of the Hiroshima atomic bomb. - Jupiter has been observed throughout human history and is so bright that you can even spot it under the artificial light dome of one of our cities. Even so it is less than 40 years ago that we were first able to view Jupiter in detail as the Voyagers streaked by it. Jupiter contains more than twice the mass of all of the other planets, dwarf planets, asteroids, and comets in our solar system combined. Eons ago, our solar systems very own giant planet, Jupiter, appears to have cleared out the inner solar system leaving enough rocky debris to form Mercury, Venus, Earth, and Mars. 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/42281060

Space Stories - Betelgeuse Was Never Alone 08/01/2026

EVSN - Betelgeuse Smaller Than Previously Calculated, Still A Mystery 07/31/2026

UNAWE Space Scoop - A Blazing Hot World With A Buzzing Secret 07/30/2026

Guide To Space - Betelgeuse Is Still Dimming! And We Have the Pictures to Prove It 07/29/2026

Awesome Astronomy - Eclipse Girl Summer! 07/28/2026

Astronomy Cast Ep. 89: Adaptive Optics 07/27/2026

Travelers in the Night Eps. 361E & 362E: Newest Moon & Tiny Beasts 07/26/2026

Travelers in the Night Eps. 361E & 362E: Newest Moon & Tiny Beasts 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 November 2025. Today's 2 topics: - The moon cycle from new moon through full moon and back to new moon again was used by many nations to regulate their activities and forms the basis of the Islamic lunar calendar. A calendar based on the first visibility of the lunar crescent is difficult to predict in advance since this observation depends on the clarity of the atmosphere and other local conditions. The interesting observational problem of when it is possible to spot the new moon has been analyzed in the scientific literature as an aid to historians who are seeking to interpret the writings of ancient civilizations. - Humans have a long history of partnerships with a variety of micro organisms. Although the proportions vary widely with individuals, recent scientific estimates suggest that a typical human being has approximately the same number of bacteria and other microbes as they do actual human cells. Now it appears that a partnership with yeast and algae will enable spacefaring humans to use their waste products to produce food and plastics during long duration space flights. 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/42177680

The Cosmic Savannah Ep. 84: Celebrating 10 Years of IDIA 07/25/2026

EVSN - Black Holes, Giant Galaxies & A Baby Planet 07/24/2026

Actual Astronomy - Messier Objects For July 2026 07/23/2026

Actual Astronomy - Messier Objects For July 2026 Hosted by Chris Beckett & Shane Ludtke, two amateur astronomers in Saskatchewan who enjoy teaching astronomy classes and showing the public views through their telescopes. Description: This month we talk about some of the globular clusters from the Messier catalogue you can easily see on summer nights. From big and bright M5 and M4 to small and mighty M80 we talk about viewing some of the best globular clusters of the year. We also talk about a large, faint face on spiral galaxy. All of these objects are possible with binoculars, most are down right easy even with small binoculars. M3 This globular cluster in Canes Venatici is one of the brightest objects in the sky. In binoculars this object is definitely not star like, but more of a bright, small snowball easy to see. Small telescopes will begin to resolve M3 into individual stars. The hardest part of this object is locating it in a portion of sky that contains few bright landmarks. M53 Another globular cluster in Canes Venatici. While not quite as big or bright as M3 it is still an obvious binocular object. Resolvable in small telescopes, it as easy object to find sharing the same low power telescope field as fifth magnitude Alpha Coma Berenices. M5 A big, bright globular cluster located in Serpens Caput. M5 is as nice as M3 but lies near a fifth magnitude naked eye star (5 Serpentis) making it an easy object to find. M68 An eighth magnitude globular cluster in Hydra, M68 is a difficult binocular object for Northern observers. It appears as a faint fuzz spot in binoculars, you may need to use averted vision or large binoculars to find this one. Appearing as a round fuzzy patch in a 8" telescope, you will need a much larger aperature to really resolve it. M83 A face on spiral in Hydra. M83 is fairly easy in binoculars as a faint, fuzzy patch of light. In a telescope look for a large patch of light with a bright center. M4 A big bright globular in Scorpius, easily located near Antares. This is an easy binocular object appearing as a round snowball. Partially resolvable in a telescope, the trade mark of this globular is a line of bright stars crossing the center. M80 This is the smallest and faintest globular cluster this month. Located in Scopius, M80 is a very tough binocular object appearing as a faint star with slight fuzziness around the edges. This is confirmed with a telescope, M80 has a bright central condensation in the middle of faint fuzz. It is one of the Messier objects that even through a medium telescope still looks like a comet. 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/42177600

Guide To Space - Where Are All The Alien Robots? The Chilling Idea Of Von Neumann Probes 07/22/2026

Ask A Spaceman Ep. 276: What Would Happen if the Sun…Stopped? 07/21/2026

Ask A Spaceman Ep. 276: What Would Happen if the Sun…Stopped? Solar Apocalypse! Hosted by Dr. Paul M. Sutter. What really keeps the Sun shining? How long would it stay warm if fusion stopped? How long would it take before we noticed? 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, Deb A, Michael J, Phillip L, Steven B, Mark R, Alan B, Craig B, Richard K, Joe R, David P, Justin, Tracy F, Thomas K, James C, Syamkumar M, Homer V, Mark D, Bruce A, Tim Z, Linda C, The Tired Jedi, Bob C, Stephen A, James R, Allen E, Michael S, Sheryl, David W, Chris, Michael S, Erlend A, James D, Karl W, Den K, Edward K, Scott K, Vivek D, M0PPET, Brad, Azra K, Steve R, M D Malahy, Brian O, Alonna M, Joseph B, and Anders J! 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/42145295

Astronomy Cast Ep. 58: Inflation 07/20/2026

Travelers in the Night Eps. 899 & 900: Hitch Hiking an Asteroid to Mars & Earth Life From Mars 07/19/2026

AstroMan - D for Dark Sky Protection 07/18/2026

AstroMan - D for Dark Sky Protection When was the last time you saw the Milky Way? In this episode of Astroman, Exodus Chun-Long Sit explores how light pollution is changing our night skies, affecting wildlife, wasting energy, and limiting our view of the universe. Learn why protecting dark skies matters—and how simple actions can help bring the stars back. “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 Chun-Long 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/42108310

EVSN - Astronomy Asks: How Did You Get There? 07/17/2026

Space Stories - Starburst Galaxy: The Universe's Stellar Baby Boom 07/16/2026

Guide To Space - What Are Fast Radio Bursts? A Big Mystery in Astronomy 07/15/2026

Deep Astronomy - Exolife Hangout: Happy Pi Day! 07/14/2026

Astronomy Cast Ep. 41: The Rise of The Supertelescopes 07/13/2026

The 365 Days of Astronomy

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