We’re not learning that the vast majority of potentially habitable worlds out there are actually icy moons like Europa and Enceladus. Good news, there are hundreds, if not thousands of times more of them than worlds like Earth. Bad news, they’re locked in ice. What have we learned about water worlds and their potential for habitability?

Our Hosts
Fraser Cain
Universe Today
Dr. Pamela Gay
CosmoQuest
Production by
- Richard Drumm, Audio Engineer
- Ally Pelphrey, Video Engineer
Ep. 500: Live Celebration!
Welcome to episode 500 of Astronomy Cast. To celebrate this momentous occasion, we’re going to look back 500 years into the past to see what we learned about the Universe. And then we’re going to look 500 years into the future.
Ep. 499: What is the proposed Hubble-Lemaitre Law?
We started out Astronomy Cast with the controversial decision to de-planet Pluto. And here we are, more than a decade later, at the brink of recording our 500th episode when another big decision is coming down from the IAU: whose name goes on the concept that our Universe is expanding: Hubble or LemaĆ®tre? It’s a big deal and Pamela knows all about it.
Astronomy Cast's Dr. Pamela Gay inducted into 2018 Academy of Podcasters Hall of Fame
CosmoQuest’s own principal investigator Dr. Pamela Gay will be inducted for her work over the past decade plus with the Astronomy Cast podcast, which will be celebrating it’s 500th episode this September.
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