
Ep. 749: Dark Energy Changing Over Time
Astronomy Cast Ep. 749: Dark Energy Changing Over Time By Fraser Cain & Dr. Pamela Gay Streamed live on Mar 24, 2025. The Hubble Tension is a vexing problem, with astronomers measuring the expansion of the Universe at different points in its history and getting different results. Errors have mostly been ruled out, which leaves the potential for new physics. Has the strength of dark energy been changing over time? We thought Dark Energy was constant with time, but new results from DESI say maybe not, and honestly, if it wasn't constant the Hubble Tension would be a whole lot easier to solve. 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, Siggi Kemmler, Andrew Poelstra, Brian Cagle, David Truog, Ed, David, Gerhard Schwarzer, Sergio Sancevero, Sergey Manouilov, Burry Gowen, David Rossetter, Michael Purcell, Jason Kwong
31 Maalis 32min

Ep. 748: Fast Radio Bursts
Astronomy Cast Ep. 748: Fast Radio Bursts By Fraser Cain & Dr. Pamela Gay Streamed live on Mar 17, 2025. 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 on Patreon. Join at the Galaxy Group level or higher to be listed in our YouTube videos. Thanks to: BogieNet, Stephen Vei, Jeanette Wink, Siggi Kemmler, Andrew Poelstra, Brian Cagle, David Truog, Ed, David, Gerhard Schwarzer, Sergio Sancevero, Sergey Manouilov, Burry Gowen, David Rossetter, Michael Purcell, Jason Kwong
24 Maalis 28min

Ep. 747: Rogue Planets
Streamed live on Mar 10, 2025. Hosted by: Fraser Cain and Dr. Pamela L. Gay Most planets orbit stars. That’s the rule, right? Well, maybe not. In fact the vast majority of planets could be floating freely through the Milky Way. Today we’re gonna talk about rogue planets. Sometimes planets just go rogue. Let's learn about planets living free from stars. Show Notes: Earth's Dust Storms Mars' Global Dust Storms Dust Storms on Titan Potential Dust Storms on Exoplanets 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, Siggi Kemmler, Andrew Poelstra, Brian Cagle, David Truog, Ed, David, Gerhard Schwarzer, Sergio Sancevero, Sergey Manouilov, Burry Gowen, David Rossetter, Michael Purcell, Jason Kwong
17 Maalis 29min

Ep. 746: Dust Storms
Astronomy Cast Ep. 746: Dust Storms By Fraser Cain & Dr. Pamela Gay Streamed live Feb 24, 2025. We have dust storms on Earth and of course the famous dust storms on Mars. There are even dust storms on Titan. What causes these storms and how do they work differently on the worlds in the solar system. But what about the exoplanets? The bane of solar panels, humans, and robots, dust storms have a way of picking up steam (or at least dust) all over the solar system. Hosted by: Fraser Cain and Dr. Pamela L. Gay 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: Andrew Poelstra, BogieNet, Brian Cagle, David, David Truog, Ed, Gerhard, Schwarzer, Jeanette Wink, Siggi Kemmler, Stephen Veit
3 Maalis 28min

Ep. 745: How We Know If Asteroids Will Attack
Astronomy Cast Ep. 745: How We Know If Asteroids Will Attack By Fraser Cain & Dr. Pamela Gay 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 L. Gay 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: Andrew Poelstra, BogieNet, Brian Cagle, David, David Truog, Ed, Gerhard, Schwarzer, Jeanette Wink, Siggi Kemmler, Stephen Veit
24 Helmi 30min

Ep. 744: Lunar Time
Astronomy Cast Ep. 744: Lunar Time By Fraser Cain & Dr. Pamela Gay 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 Patreon. Join at the Galaxy Group level or higher to be listed in our YouTube videos. Thanks to: Andrew Poelstra, BogieNet, Brian Cagle, David, David Truog, Ed, Gerhard, Schwarzer, Jeanette Wink, Siggi Kemmler, Stephen Veit
17 Helmi 31min

Ep. 741: Technosignatures
Astronomy Cast Ep. 741: Technosignatures By Fraser Cain & Dr. Pamela Gay Streamed live on Jan 20, 2025. As humanity developed more advanced technology, we’re having a larger effect on our environment. The more we do, the more we could be detectable. And this gives us ideas on how we could detect other civilizations, even if they don’t realize we’re watching. 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: Andrew Poelstra, BogieNet, Brian Cagle, David, David Truog, Ed, Gerhard, Schwarzer, Jeanette Wink, Siggi Kemmler, Stephen Veit
27 Tammi 36min

Ep. 740: Sneaky Stars!
Astronomy Cast Ep. 740: Sneaky Stars! By Fraser Cain & Dr. Pamela Gay Streamed live on Jan 13, 2025. Why stars can’t be trusted! If you’re an astronomer you depend on accurate observations of stars, but there’s a problem. Stars are sneaky! Changing in size, brightness, color, they hide their chemistry, their age and even their companions from all but the cleverest observers. Stars explode precisely when they intend to. Betelgeuse took a brightness plunge, T CrB refused to go nova, and other failures to be predictable irk observers for good reasons. Let's talk about it. 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: Andrew Poelstra, BogieNet, Brian Cagle, David, David Truog, Ed, Gerhard, Schwarzer, Jeanette Wink, Siggi Kemmler, Stephen Veit
20 Tammi 30min