Astronomy Cast Ep. 778: Dyson Swarms By Fraser Cain & Dr. Pamela Gay Streamed live on Jan 5, 2026. Freeman Dyson asked a fascinating question. What would it look like if a civilization was using all the energy coming from their star? And what form would this take? This introduced the concept of a Dyson Sphere, or more realistically, a Dyson Swarm surrounding ... Show More
Jan 5
Ep. 777: The Eddington Limit
Astronomy Cast Ep. 777: The Eddington Limit By Fraser Cain & Dr. Pamela Gay Streamed live on Dec 29, 2025. How big can a star get? This is a calculation made by one of the original pioneers of modern astronomy, Sir Arthur Eddington. And it's named after him, the Eddington Limit. ... Show More
35m 33s
Dec 22
Ep. 775: The Hydrogen 21-cm Line
Astronomy Cast Ep. 775: The Hydrogen 21-cm Line By Fraser Cain & Dr. Pamela 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 ... Show More
34m 34s
Mar 2025
An extinction-level event for NASA science
<p>NASA's science missions have transformed our understanding of the Universe, from breathtaking images of deep space to robotic explorers on Mars. But now, a reported 50% cut to NASA's science budget threatens to shut down missions, halt discoveries, and devastate the future of ... Show More
1h 7m
Jan 2025
Apollo Secrets, Cosmic Questions & Martian Mysteries: #484
<b>Space Nuts Episode 484: Unveiling Moon Mysteries, Fermi Paradox Insights, and Mars Terraforming Challenges - A Holiday Special Episode</b><br />Join Andrew Dunkley and Professor Fred Watson as they delve into the fascinating realms of lunar exploration, the enigmatic Fermi Par ... Show More
32m 59s
Dec 2024
Journey to the Stars with Bill Nye
<p>Could life hitchhike across planets? What color is the sky on Mars? Neil deGrasse Tyson and Bill Nye, the current CEO of The Planetary Society, team up to discuss the science and advocacy that goes into space exploration, unraveling the threads of discovery that define humanit ... Show More
44m 41s
Aug 2023
Mars Life Explorer: The search for extant life on the red planet
<p>Many missions are working to understand Mars' past habitability, but could there still be microbial life on the red planet today? This week on Planetary Radio, we discuss the proposed Mars Life Explorer mission with Amy Williams, assistant professor of geology at the Universit ... Show More
57m 43s
Dec 2023
A Year in Mars Dune Alpha
To prepare for the day when humans travel to Mars, NASA is conducting a one-year experiment in a Mars simulation environment. So what’s it like to spend a year in CHAPEA, the Crew Health and Performance Exploration Analog? In this season finale episode, travel through the airlock ... Show More
26m 21s