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Walkabout the Galaxy

Walkabout the Galaxy

By: Joshua Colwell Adrienne Dove and James Cooney
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The accidentally educational astronomy podcast, Walkabout the Galaxy provides an entertaining and easy-to-understand look at the latest fascinating news and discoveries in astronomy and space science, with a dash of trivia and rocket news.Joshua Colwell Nature & Ecology Science
Episodes
  • Second Generation Black Hole Mergers and Solar System Chaos
    Jun 4 2026

    Exquisitely detailed measurements of the ripples in spacetime from the mergers of black holes now show that some of these merging black holes were, themselves, created by an earlier black hole merging event. While this had been suspected to take place, we now have clear evidence of it. On a less dramatic scale but much closer to home, new simulations of the early solar system suggest the large population of moons of Uranus needed help from a now long lost fifth giant planet to survive. Join us for all this, space news, trivia, and a generally good time.

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    47 mins
  • Whacky Black Hole Collisions and Strange Uranian Rings
    May 20 2026

    Mysterious bright blue flashes from relatively empty parts of the universe have a new possible explanation involving, what else, black holes. We explore this new idea to explain Luminous Fast Blue Optical Transients (LFBOTs) with black hole collisions, take a peek at the black hole in our own Milky Way, and discuss some puzzling observations of two of the rings of Uranus. Plus, we have a stupid stumper, exoplanet trivia, space news, and a top quark hot take!

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    50 mins
  • Little Plutino Has An Atmosphere and Making Sense of Saturn
    May 13 2026

    A Plutino, an object that shares Pluto's orbit but which is much smaller than Pluto, appears to have a very thin global atmosphere. We discuss the detection and how such a small body could hold onto even a thin atmosphere, as well as a new model that describes many of Saturn's peculiarities with a recent collision between its big moon Titan and a precursor to the sponge-y moon Hyperion. Join us for all this, space news, astronomy trivia, and much more.

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    47 mins
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