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Astronomy Cast

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Apr 28, 2025

Astronomy Cast Ep. 753: Why is the Moon's South Pole So Interesting?

By Fraser Cain & Dr. Pamela Gay

Streamed live on Apr 21, 2025.

I’m sure you’ve heard that all eyes are on the Moon’s southern pole. This is where various  NASA and Chinese missions are targeting. What makes this region so special and what are...


Apr 21, 2025

Astronomy Cast Ep. 752: Should We Go to the Moon or Mars Next?

By Fraser Cain & Dr. Pamela Gay

Streamed live on Apr 16, 2025.

Hosted by: Fraser Cain and Dr. Pamela L. Gay

There is an ongoing debate on where NASA should go next with humans: to the Moon or Mars. (Or maybe an asteroid or one of Mars’ moons). We are on...


Apr 14, 2025

Astronomy Cast Ep. 751: Vacuum Energy

By Fraser Cain & Dr. Pamela Gay

Streamed live on Apr 7, 2025.

Hosted by: Fraser Cain and Dr. Pamela L. Gay.

Even empty space isn’t empty. It’s filled with the quantum fluctuations of spacetime itself. Which can be measured with famous experiments like the Casimir Effect. There...


Apr 7, 2025

Astronomy Cast Ep. 750: Supernova Early Warning System

By Fraser Cain & Dr. Pamela Gay

Streamed live on Mar 31, 2025.

Hosted by: Fraser Cain and Dr. Pamela L. Gay

When enormous stars detonate as supernovae they release a burst of neutrinos that can be the first sign of a coming explosion. Now, astronomers have built a...


Mar 31, 2025

Astronomy Cast Ep. 749: Dark Energy Changing Over Time

By Fraser Cain & Dr. Pamela Gay

Streamed live on Mar 24, 2025.

The Hubble Tension is a vexing problem, with astronomers measuring the expansion of the Universe at different points in its history and getting different results. Errors have mostly been ruled out, which...