Walkabout the Galaxy
An irreverent and informative tour of the latest, greatest, and most interesting discoveries in astronomy.
- Indexed episodes, last 90 days
- 7
- Latest publication
- Sep 26, 2026
- Audience
- Checking…
- Earliest in this view
- Jul 9, 2026
Latest episodes
Backwards Exoplanet and Shrinking Mercury (opens the original)
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An exoplanet has been discovered orbiting its star in the opposite direction of its star's rotation, a phenomenon that previously has only been observed in the presence of another star or massive sub-stellar object that can rotate the plane of planet's orbit. In this case, no such obvious explanation exists, suggesting that after the star formed an entire new planet formation disk accreted around the star of unknown origin. Planets close to home also continue to surprise, with a new gas escape m
Have We Detected Dark Matter? (opens the original)
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An intriguing detection from a dark matter experiment may be the first direct detection of a dark matter particle. This detection would mean dark matter is made of WIMPs: Weakly-Interacting Massive Particles. There's a non-negligible chance that this is an odd background detection and not dark matter, but if it is, we'll see more like it in the next few years. We also take a look at a study of what might have happened to a moon of Venus if it had formed one like Earth did, plus trivia and space
Mapping a Galaxy's Dark Matter and a Game-Changing Space Telescope (opens the original)
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The Nancy Grace Roman Space Telescope sees 100 times more sky than the Hubble Space Telescope and has the ability to directly image planets around other stars like those in our own solar system. Learn about this game-changing space telescope as well as new take on old Hubble observations that allows dark matter to be mapped on a finer scale than ever before.
Black Hole Stars and Solar Instabilities (opens the original)
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What do you call a very-but-not-so-supermassive black hole completely encased in a warm dense cloud of hydrogen? A hot mess? How about "black hole star", a new category of crazy astronomical object that can explain some of the James Webb Space Telescope's mysterious findings from the early universe. And we're a step closer to understanding our own star with dazzling data from the Inouye Solar Telescope that shows evidence of a fluid instability at the surface that helps explain how the solar cor
Dyson Spheres and Interstellar Colonization (opens the original)
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Strange and Top are at it again with a deep dive on the physics, psychology, and philosophy of the big questions: is there technologically advanced life out there in the galaxy, and if so, we will ever know? Will we make it out of the solar system, and if so, what would that look like? Join us for all that and a physics question disguized as a trivia question.
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