Astronomy Cast

Take a facts-based journey through the universe.


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13 Seasons and more than 500 episodes await.

Ep. 585: Super Earths, Mini-Neptunes, Gas Dwarfs

Ep. 585: Super Earths, Mini-Neptunes, Gas Dwarfs

As astronomers are finding even more new extrasolar planets, they’re starting to discover entirely new categories. There are classes of planets out there that we just don’t have any analog here in the Solar System. Let’s talk about them.

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Ep. 584: Sample Return Missions from Asteroids

Ep. 584: Sample Return Missions from Asteroids

With a sample of asteroid Bennu firmly inside OSIRIS-REx’s return capsule, it’s time to bring this treasure home so scientists can study the composition and history of the space rock. But it’s not the only sample return mission out there, with Japan’s Hayabusa2 mission also bringing asteroid debris home. Today, let’s talk about the missions and what we’ve learned so far.

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Ep. 583: The Nobel Prize

Ep. 583: The Nobel Prize

This year’s Nobel Prize in Physics was awarded to three brilliant researchers who worked out some of the secrets of black holes. Today we’re going to talk about the chain of discoveries that led to this award.

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