Show overview
Astronomy Cast has been publishing since 2006, and across the 20 years since has built a catalogue of 688 episodes, alongside 42 trailers or bonus episodes. That works out to roughly 360 hours of audio in total. Releases follow a fortnightly cadence, with the show now in its 19th season.
Episodes typically run twenty to thirty-five minutes — most land between 29 min and 33 min — and the run-time is fairly consistent across the catalogue. None of the episodes are flagged explicit by the publisher. It is catalogued as a EN-language Science show.
The show is actively publishing — the most recent episode landed 4 days ago, with 30 episodes already out so far this year. The busiest year was 2012, with 62 episodes published.
From the publisher
Take a fact-based journey through the cosmos. Tune in to hear weekly discussions on astronomical topics ranging from planets to cosmology. Hosted by Fraser Cain (Universe Today) and Dr. Pamela L. Gay (Planetary Science Institute), this show brings the questions of an avid astronomy lover direct to an astronomer. Together Fraser and Pamela explore what is known and being discovered about the universe around us. Astronomy Cast is supported thru patreon.com/AstronomyCast.
Latest Episodes
View all 688 episodesEp. 805: Mission Tech Series - Gyroscopes & Servos
Ep. 804: Mission Tech Series: Fairings, Docking & Airlocks
Ep. 803: Mission Tech Series: Engines & Stages
Ep. 802: Mission Tech Series: Rocket & Spacecraft 411
Ep. 801: The Beginning & End of Everything - Part 2
Astronomy Cast Can't Go On Like This
Ep. 800: The Beginning & End of Everything - Part 1
Ep. 799: Heavy Lift Rockets
Ep. 798: Our Summer Media List
Ep. 797: Summer in Space
Ep. 796: Oceans & Organics on Mars
Ep. 795: Expanse Science
Ep. 794: Stargate Science
Ep. 793: Star Trek Science
Ep. 792: Star Wars Science
Ep. 791: Chang'e Sample Return
Ep. 790: Meteorites From Other Worlds
Ep. 789: What Happens When a Planet's Star Dies
S19 Ep 788Ep. 788: Life's Molecules Form in Space
Astronomy Cast Ep. 788: Life's Molecules Form in Space By Fraser Cain & Dr. Pamela Gay Streamed live on Mar 23, 2026. The theory of evolution how life takes on its wildly different forms. But how did life get started in the first place? It appears the Universe has been making life's molecules in space for billions of years, setting up the conditions for life… everywhere? One of humanity's fundamental questions is "where does life come from." We can't answer that question, but we can tell you where some of the stuff of life came from. This show is supported through people like you on Patreon.com/AstronomyCast In this episode, we'd like to thank: Burry Gowen, Eric Lee, Jeanette Wink, Michael Purcell, Andrew Poelstra, David, David Rossetter, Ed, Gerhard Schwarzer, Jason Kwong, Joe McTee, Sergey Manouilov, Siggi Kemmler, Sergio Sancevero
S19 Ep 787Ep. 787: Evolved Stars (They're not dead yet!)
Astronomy Cast Ep. 787: Evolved Stars (They're not dead yet!) By Fraser Cain & Dr. Pamela Gay Streamed live on Mar 16, 2026. Main sequence stars spend most of their time being… normal. Fusing hydrogen into helium in their cores. Producing radiation. But as their stockpiles of hydrogen run out they switch to other fuels, starting to climb the ladder of the periodic table of elements. And this is when things get weird. As we get more and more observations of the cosmos, our understanding gets more detailed. In this episode we look at all the ways a star can die and the updates that we've learned in the past 20 years of Astronomy Cast. Image Credit: NASA Galex This show is supported through people like you on Patreon.com/AstronomyCast In this episode, we'd like to thank: Burry Gowen, Eric Lee, Jeanette Wink, Michael Purcell, Andrew Poelstra, David, David Rossetter, Ed, Gerhard Schwarzer, Jason Kwong, Joe McTee, Sergey Manouilov, Siggi Kemmler, Sergio Sancevero