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Astronomy Cast

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Oct 14, 2019

542: Weird Issues: The Age of the Universe

Astronomy Cast 542: Weird Issues: The Age of the Universe

by Fraser Cain & Dr. Pamela Gay

Our series on Universe weirdness continues, this time we learn how astronomers are struggling to make sense of the age of...


Oct 7, 2019

541: Weird Issues: Expansion Rate of the Universe

Astronomy Cast 541: Weird Issues: Expansion Rate of the Universe

by Fraser Cain & Dr. Pamela Gay

Just when the Universe was starting to make sense, the cosmos throws a curveball at us. Astronomers have been trying to accurately measure the expansion rate of the Universe...


Sep 30, 2019

540: Weird Issues: How Do (or Don't) Planets Form?

Astronomy Cast 540: Weird Issues: How Do (or Don't) Planets Form?

by Fraser Cain & Dr. Pamela Gay

As astronomers started to discover planets orbiting other stars, they immediately realized that their expectations would need to be tossed out. Hot jupiters? Pulsars with...


Sep 23, 2019

539: Weird Issues: Why We Don't Know the Age of Saturn's Rings

Astronomy Cast 539: Weird Issues: Why We Don't Know the Age of Saturn's Rings

by Fraser Cain & Dr. Pamela Gay

How old are Saturn's rings? They could be brand new, or they could be as ancient as the Solar System itself. Planetary scientists thought they knew...


Sep 16, 2019

538: Asteroids: Rubble piles of the Solar System

Astronomy Cast 538: Asteroids: Rubble piles of the Solar System

by Fraser Cain & Dr. Pamela Gay

Thanks to all the work from Hayabusa 2 and OSIRIS-REx, astronomers are getting a much better look at the smaller asteroids in the Solar System. It turns out, they're piles of ...