All posts by Astronomy Cast

Fraser Cain and Pamela Gay are the hosts of Astronomy Cast, a weekly astronomy podcast that follows a facts-based journey through the Universe.

By Astronomy Cast on October 14, 2019 in
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Astronomers have been trying to accurately measure the expansion rate of the Universe. It’s been tough to nail down, and now astronomers are starting to figure out why.

By Astronomy Cast on October 7, 2019 in
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Weird Issues: How Do (or Don’t) Planets Form? Hot jupiters? Pulsars with planets? We’re now decades into this planets discovery & the Universe is continuing to surprise us. #365DaysOfAstro

By Astronomy Cast on September 30, 2019 in
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How old are Saturn’s rings? They could be brand new, or they could be as ancient as the Solar System itself. more at #365DaysOfAstro

By Astronomy Cast on September 23, 2019 in
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Thanks to Hayabusa 2 & OSIRIS-REx, we can learn more about this piles of rubble. A fascinating piles of rubble. Let’s talk about what we’ve learned so far. #365DaysOfAstro

By Astronomy Cast on September 16, 2019 in
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We took a hiatus this summer, but SpaceX sure didn’t, with the tests of the Starhopper prototype. Today we’re going to talk about the revolution in reusable rocketry and quest to build a fully reusable two-stage rocket.

By Astronomy Cast on September 9, 2019 in
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This week we wonder if you can made a black hole by accelerating a mass, but then can you un-make it again? Will the Earth ever be tidally locked to the Sun? And can dark matter crush an unsuspecting space ship?

By Astronomy Cast on September 2, 2019 in
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This week we wonder if the Universe is going to collapse and then expand again, how satellites can have such different velocities, and the size of the observable Universe.

By Astronomy Cast on August 26, 2019 in
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How do planets get their atmospheres? What would happen to the Earth if the Moon just disappeared? And what’s that strange glow we see after sunset?