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PODCAST

Astronomy Cast Full Raw Feed

Fraser Cain & Dr. Pamela L. Gay

This is the full live stream audio of the Astronomy Cast episodes. The first half hour is the regular episode, and the second half hour is a Q&A session with questions submitted by live viewers and email.

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All Episodes

31:53

Ep. 772: 2025 Gift Guide

Astronomy Cast Full Raw Feed ·

2025/11/24

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

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56:45

Ep. 767: Black Holes in Extreme Circumstances

Astronomy Cast Full Raw Feed ·

2025/10/13

Hosted by: Fraser Cain and Dr. Pamela L. Gay Streamed live on Oct 6, 2025. You can only describe a black hole by its mass and its spin. And maybe it’s charge. But allow us to propose a new criteria: the personal experience. Some black holes have seen things… Experienced the laws of physics at their most extreme. And today we’ll tell their stories. The more of the sky we observe, the more bizarre situations we find black holes in. Let's explore! This show is supported through people like you on

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01:00:13

Ep. 766: How Spacecraft End

Astronomy Cast Full Raw Feed ·

2025/10/06

End-of-Life Planning for Your Spacecraft! Streamed live October 1, 2025. Your spacecraft has reached the end of its mission. You’ve done everything you can to keep it operational, but now it’s time to say goodbye. How do space agencies deal with spacecraft to shut them down gracefully, protect future missions and life on other worlds. So, the time has come to see your mission across the Rainbow Bridge. How exactly do you say goodbye? Let's discuss.

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59:38

Ep. 765: Rockets vs The Environment

Astronomy Cast Full Raw Feed ·

2025/09/29

Streamed live on Sep 22, 2025. We don’t launch a lot of rockets every year, so their impact on the environment is minimal compared to other forms of transportation. But that number is steadily increasing with rates that we’ll have to take seriously. What’s the current and future impact of rockets on the environment Rocket facilities are often surrounded by wildlife preserves and they always fly through our atmosphere. Let's take a look at how launches do and don't impact the environment around them

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01:03:10

Ep. 763: Interstellar Comets

Astronomy Cast Full Raw Feed ·

2025/09/15

Streamed live Sep 8, 2025. Welcome to the first episode of our 19th season! This week we look at objects coming from other solar systems that come passing on by our Sun. During the summer hiatus the 3rd interstellar object was discovered: Comet 3I/ATLAS! So now we have 3 different interstellar interlopers to compare & contrast. What are we starting to learn about other star systems from this small sample size and how will our detection get even better? [Editor’s note: HiRISE’s telescope is 1/2

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58:38

Ep. 762: Science in Crisis - NASA’s New Budget

Astronomy Cast Full Raw Feed ·

2025/07/07

Streamed live on Jun 30, 2025. Hosted by: Fraser Cain and Dr. Pamela L. Gay Normally we try to end the season on a high note. But there’s unfolding news that we just HAVE to cover before we leave you for the summer. NASA’s new budget is here, and it’s 25% smaller. We’ll cover what the changes are and try to understand the implications. It's a bad decade to be a researcher. We're going to look at why, and what US cuts will mean for the world. [Editor's note] There was an audio problem with Pamela's

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44:44

Ep. 761: It's Here! The Vera Rubin Observatory

Astronomy Cast Full Raw Feed ·

2025/06/30

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,

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56:23

Ep. 759: The Commercial Space Program

Astronomy Cast Full Raw Feed ·

2025/06/16

Streamed live on Jun 9, 2025. Humanity has turned its focus back to the Moon, sending a fleet of spacecraft to the lunar surface. Some are run by the government, but there’s a whole new group of commercial landers bearing instruments to the lunar surface. Is this the future of lunar exploration? Space used to be a place occupied by government-funded and military missions, but today, we're seeing the rise... and fall (somersault, crash, and explosion) of missions with commercial design and funding

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01:03:01

Ep. 757: CubeSats

Astronomy Cast Full Raw Feed ·

2025/05/26

Streamed live on May 19, 2025. Computers are getting smaller, faster and more capable, which has enabled an entirely mew class of satellites: CubeSats. A mission small enough that you can hold it in your hands, and yet powerful enough to even travel to other planets and send messages home. Every year, our electronics seem to get smaller and more powerful, with today's smart watches being more fully featured than the computers Pamela and Fraser had as little kids. These tiny processors, sensors,

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58:57

Ep. 754: K2-18b

Astronomy Cast Full Raw Feed ·

2025/05/05

Streamed live on Apr 28, 2025. Hosted by: Fraser Cain and Dr. Pamela L. Gay You’ve heard the news! Astronomers are reporting the discovery of biosignatures at K2-18b. Is this proof of life or should we all be more skeptical? It's in the news and people are claiming aliens... but is it aliens? Let's see what the data actually says. 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

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01:00:31

Ep. 753: Why is the Moon's South Pole So Interesting?

Astronomy Cast Full Raw Feed ·

2025/04/28

Streamed live on Apr 21, 2025. I’m sure you’ve heard that all eyes are on the Moon’s southern pole. This is where various NASA and Chinese missions are targeting. What makes this region so special and what are the special challenges that explorers will face. From TV shows to real-world missions, it seems like everyone just wants to explore the Moon's South Pole. But why? Learn here! SUPPORTED BY YOU This Episode is made possible thanks to our Patrons on Patreon. Join at the Galaxy Group level or

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01:01:26

Ep. 750: Supernova Early Warning System

Astronomy Cast Full Raw Feed ·

2025/04/07

Streamed live on Mar 31, 2025. Hosted by: Fraser Cain and Dr. Pamela L. Gay When enormous stars detonate as supernovae they release a burst of neutrinos that can be the first sign of a coming explosion. Now, astronomers have built a network to watch for that flash of neutrinos, and help direct their telescopes for when the sky show begins. Supernovae explosions occur in stages, with neutrinos being emitted hours before photons. If we can accurately detect those neutrinos, we might just be able to

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54:46

Ep. 748: Fast Radio Bursts

Astronomy Cast Full Raw Feed ·

2025/03/24

Streamed live on Mar 17, 2025. Hosted by: Fraser Cain and Dr. Pamela L. Gay. For the briefest of moments, some dead stars can flash brighter than their entire galaxy (in Radio light) and then live to do it again and again. It’s time for an update on fast radio bursts, a phenomenon we’ve only known about for a few decades. In this time astronomers have learned a tremendous amount them. They’re not solved, but we’re getting closer! SUPPORTED BY YOU This Episode is made possible thanks to our Patrons

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57:34

Ep. 745: How We Know If Asteroids Will Attack

Astronomy Cast Full Raw Feed ·

2025/02/24

Streamed live Feb 20, 2025. I’m sure you’ve heard the news, asteroid 2024 YR4 has a tiny chance of hitting Earth in 2032. How do astronomers discover these dangerous asteroids, measure their future impact risk and track the changes over time? When should we panic? New asteroids are found every day, and every day we learn that those asteroids don't have any murderous intentions. But how do we learn that? In this episode we dig into asteroid orbital determination. Hosted by: Fraser Cain and Dr. Pamela

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01:00:53

Ep. 744: Lunar Time

Astronomy Cast Full Raw Feed ·

2025/02/17

Streamed live on Feb 10, 2025. What time is it? OK, fine, what time is it on the Moon? The Moon orbits the Earth, so it doesn’t fall into a specific time zone. Also, there’s lower gravity on the surface of the Moon, which changes the rate that clocks tick. Well… It’s time to introduce Lunar Time. When are you when you are on the Moon? Researchers are putting together definitions! Hosted by: Fraser Cain and Dr. Pamela L. Gay SUPPORTED BY YOU This Episode is made possible thanks to our Patrons on

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01:05:15

Ep. 743: What Else Can We Learn From Gravitational...

Astronomy Cast Full Raw Feed ·

2025/02/10

Streamed live on Feb 3, 2025. Just a few years ago LIGO detected the first direct evidence of gravitational waves coming from colliding black holes. And there you have it. Boom! Black holes collide! But that wasn’t all we learned from gravitational waves, nor will we learn. Sure, the masses of merging black holes are nice to know, but what else can we learn from gravitational black holes? Hosted by: Fraser Cain and Dr. Pamela L. Gay SUPPORTED BY YOU! This Episode is made possible thanks to our

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01:02:46

Ep. 738: Looking Ahead to 2025

Astronomy Cast Full Raw Feed ·

2024/12/23

What can we hope (or dread) to see in 2025? Last week we talked about the 2024 strangeness. Now we’re gonna talk about the upcoming space stories for 2025 that we’re looking forward to. It’s a nice mix of new rockets, new missions and new fly-bys. Hosted by: Fraser Cain and Dr. Pamela L. Gay

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57:49

Ep. 737: Weird Science Stories From 2024

Astronomy Cast Full Raw Feed ·

2024/12/16

Streamed live December13, 2024. Hosted by: Fraser Cain and Dr. Pamela L. Gay. 2024 was a strange year! I’ll let your imagination take flight and consider how 2024 was weird for you. But, for space and astronomy we had some interesting, revolutionary, unsettling and downright weird stories pop up. Today let’s talk about them.

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58:49

Ep. 734: The Einstein Mission

Astronomy Cast Full Raw Feed ·

2024/11/18

Streamed live on Nov 11, 2024. Hosted by: Fraser Cain and Dr. Pamela L. Gay. Another day, another space telescope! Today we’re looking at the newly launched Einstein Probe. A collaboration between the Chinese Space Agency and the European Space Agency. The mission has been operating since January searching the cosmos for short, bright flashes of X-rays. 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

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01:00:41

Ep. 731: Neil Gehrels

Astronomy Cast Full Raw Feed ·

2024/10/28

Streamed live on Oct 21, 2024. Let's look at the man whose name is carried by the Neil Gehrels Swift Telescope. Hosted by: Fraser Cain and Dr. Pamela L. Gay.

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