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Astronomy Cast

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Dec 20, 2021

Astronomy Cast Ep. 625: End of the Year Review

by Fraser Cain & Dr. Pamela Gay

We've reached the end of 2021 and this is the last episode of the year. Let's look back at the big space events of the last year and talk about what we're looking forward to in 2022.

Dec 13, 2021

Astronomy Cast Ep. 624: Small Rocky Bodies (Including Phobos & Deimos)

by Fraser Cain & Dr. Pamela Gay

We've talked about the icy objects of the Solar System, today let's talk about space rocks. There's a surprising variety of rocky material in the Solar System, and each object has a story to tell about the history and...

Dec 6, 2021

Astronomy Cast Ep. 623: NEOs: Concern or Nah

by Fraser Cain & Dr. Pamela Gay

Are asteroids dangerous? Well, just ask the dinosaurs and they’ll tell you a sad story of fiery death. It turns out we’re in a shooting gallery of space rock and metal. And somewhere out there there’s one with our name on it. Should we be...

Nov 29, 2021

Astronomy Cast Ep. 622: Rockier Moons & Giant Asteroids

by Fraser Cain & Dr. Pamela Gay

So a rock is a rock is a rock. Right? Across the solar system there are giant rocky asteroids and even “gianter” rocky moons. What is the difference between these two families of objects and where do they come from?

Nov 22, 2021

Astronomy Cast Ep. 621: Gas Giants

by Fraser Cain & Dr. Pamela Gay

For the longest time the only gas giant planets that we knew about were Jupiter and Saturn. But now, in the age of extrasolar planets, astronomers have discovered thousands of gas giants across almost as many star systems. What new discoveries have been...