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Astronomy Cast

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Oct 18, 2021

Astronomy Cast Ep. 615: Planet 9

by Fraser Cain & Dr. Pamela Gay

After Pluto lost its planethood we were down to 8 planets. But there’s growing evidence of another world or worlds out beyond the orbit of Pluto. Is Planet 9 out there and how will we find it? Could there even be a Planet 10?

Oct 11, 2021

Astronomy Cast Ep. 614: Centaurs, Comets & Asteroids

by Fraser Cain & Dr. Pamela Gay

So there are asteroids, and there are comets. But there’s an entirely separate class of objects called centaurs. But instead of half human, half horse, imagine an object that’s half comet, half asteroid, but 100% interesting!

Oct 4, 2021

Astronomy Cast - Ep. 613: Pluto’s Demotion: 15 Years Later

by Fraser Cain & Dr. Pamela Gay

It's been 15 years since Pluto was kicked out of the planet club. It also happens to be the topic of our very first episode of Astronomy Cast more than 600 episodes ago. Are there any updates? Does Pluto have a chance of...

Jul 12, 2021

Astronomy Cast Ep. 612: Hiatus Message

by Fraser Cain & Dr. Pamela Gay

Fraser & Pamela will return in early September with more episodes of Astronomy Cast. We hope you all have a safe, relaxing and prosperous summer!

Jul 5, 2021

Astronomy Cast Ep. 612: The SETI Renaissance

by Fraser Cain & Dr. Pamela Gay

Last week we talked about the various ways that astronomers could detect the presence of intelligent civilizations by observing technosignatures. This week we'll give you an update on the state of the search for extraterrestrials. This field...