365 Days of Astronomy - Weekly Edition

Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)

Streamed live on Oct 27, 2026.

The majority of rockets use a chemical propulsion system, but there are other ideas, fancy ideas that sound like they came from science fiction. But they’re real and they work! Today we’ll talk about ion engines, used by tie fighters everywhere!

Streamed live 18 Oct 2026.

Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)

Today we continue looking at space exploration technologies. This time we will examine thrusters, which can reorient a spacecraft and help it maneuver in space. Maximum flexibility but you need to bring along some propellant. 

Smarter Every Day’s YouTube video:

I Was SCARED To Say This To NASA... (But I said it anyway)

https://www.youtube.com/watch?v=OoJsPvmFixU

Spinney things!

Streamed live 18 Oct 2026.

Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)

Our journey through space exploration technology continues! Today we look at the things that spin: gyros, reaction wheels, servos. Newton’s laws are large and in charge today as spinning has a very useful benefit when you’re in weightlessness! Today we are going to understand the nemesis of space exploration missions everywhere, get to the bottom of this, how these things works, why they fail, and maybe what’s being done about it, or maybe not! 

Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)

Streamed live on Oct 3, 2026.

Mission Tech Part 3.

Instead of sending up an entire space station for every mission, you can just send up a tiny can filled with astronauts. But that takes docking. And today we’re gonna talk about what it takes to connect two spacecraft together. How to keep a cargo safe to get into orbit, and how to get in and out of your spacecraft without killing everyone!

Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)

Streamed on October 3, 2026.

Today our series continues with our deep dive into rockets, their engines & stages. We fall into the tyranny of the rocket equation and discover what it takes to escape Earth’s gravity and head off into deep space.

We removed all ads from the show. We need to get to 1,500 patrons to keep it this way. We need your support!

Streamed live on Sep 21, 2026

Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)

Today we begin a new series on rockets and spacecraft, dealing with each of their components. It’s a big job, so it’ll take us a bunch of episodes to get through. Today let’s do an introduction about what we’re gonna talk about in this series: rockets from tip to tail, soup to nuts.

Streamed live on Sep 7, 2026.

Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)

This show is supported through people like you on Patreon.com/AstronomyCast

Today we do the sequel to our 2-part series. We jump to the end of the Universe, and all the major moments that will occur from now until the heat death of the Universe. The end of everything.

- The fate & future of the Milky Way

- Cosmic isolation

- The cosmic microwave background

- The end of star formation

- The degenerate era

- Proton decay and entropy

- Black hole evaporation & entropy

- Alternate endings, cosmic rip, new beginnings

- Closing thoughts and updates

Streamed live on Sep 7, 2026.

Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)

This show is supported through people like you on Patreon.com/AstronomyCast

To celebrate our 20th season, we thought we’d go back right to the beginning… of everything. Let’s wind the clock back to the earliest moments of the Universe, where we’ll measure time in fractions of a second. As the foundational laws of physics were laid down and we experience the repercussions to this day!

Hosted by: Fraser Cain (@frasercain) and Dr. Pamela L. Gay (@CosmoQuest)

Streamed live June  22, 2026.

The Saturn 5 was a monster, capable of sending humans and a lander to the Moon and bringing them back again. But the number of heavy lift rockets since then has gotten pretty sparse. Now, with tens if not hundreds of thousands of satellites in the works, giant new space telescopes and multi-ton lunar landers in development there are heavy lift solutions to match. So let’s talk about them! From yesterday's Saturn V to today's Ariane VI, rockets capable of launching large telescopes or small space stations in a single go are modern marvels. They are also wildly dangerous, and not exactly compatible. Let's look at today's fleet of rockets and just what they're accomplishing. 

This show is supported through people like you on Patreon.com/AstronomyCast 

In this episode, we'd like to thank: Andrew Poelstra, Burry Gowen, David, David Rossetter, Ed, Eric Lee, Gerhard Schwarzer, Jason Kwong, Jeanette Wink, Joe McTee, Michael Purcell, Sergey Manouilov, Siggi Kemmler

Streamed live on Jun 15, 2026.

Well, we’re just a couple of weeks away from summer hiatus and so it’s time to give you some homework. Here’s our list of stuff we’ve been reading watching and playing. This should fill the Astronomy-Cast-shaped hole in your media landscape. On the plane, on the beach, from the passenger seat in a car, summer is a time for escaping into a good book, video, or game. From classics to the latest releases, here are our recommendations for keeping your brain occupied while your body is renewed.

This show is supported through people like you on Patreon.com/AstronomyCast 

In this episode, we'd like to thank: Andrew Poelstra, Burry Gowen, David, David Rossetter, Ed, Eric Lee, Gerhard Schwarzer, Jason Kwong, Jeanette Wink, Joe McTee, Michael Purcell, Sergey Manouilov, Siggi Kemmler