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Walkabout the Galaxy

Jul 28, 2021

They have to be out there, and now we have a first direct glimpse of what is likely to be the birthplace of an exomoon - a moon forming in a disk around a planet orbiting another star. We check in on the curious case of FBOTs (fast blue optical transients), and closer to home we've learned that Mars' interior has a...


Jul 21, 2021

Lithium is not just in demand for all those new electric car batteries, it seems there's a problem with missing lithium in the universe. We explore the Cosmological Lithium Problem, take a look at what tree rings and the sea floor have to tell us about Earth's space environment, and take a deep dive into wormholes for...


Jul 14, 2021

Beware the Squire of Gothos for the Kepler mission has discovered 4 more new free-floating planets. LIGO has observed the first collision between a black hole and a neutron star, and the ocean of Enceladus just might harbor life. Learn about these astronomical developments and much more, including a Venus exploration...


Jul 7, 2021

In another wide-ranging episode, we discuss how atmospheric and oceanic chemistry changes wiped out most life on Earth 250 million years ago, the best evidence yet for a third type of supernova, and the importance of timekeeping for astronomy and space missions. We also have historical clock trivia and a lot of space...


Jun 23, 2021

Just when the mysterious dimming of nearby giant star Betelgeuse is explained, a more distant giant star was almost completely blocked out. We discuss the very different explanations for these two stellar events, and we check in with updates on metallic asteroid Psyche and other Astroquarkian asteroid news.