Walkabout the Galaxy
Joshua Colwell, Adrienne Dove, and James Cooney
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Second Generation Black Hole Mergers and Solar System Chaos
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…
Whacky Black Hole Collisions and Strange Uranian Rings
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…
Little Plutino Has An Atmosphere and Making Sense of Saturn
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…
Superkilonova and Artemis II Recap
Gravitational waves and light combine to reveal what is suspected to be a superkilonova which is much cooler than the name suggests. Cool in the cool way, not the temperature way. Learn about…
A Whisper of a Hint of Primordial Black Holes plus Earth BLOBs
Gravitational Wave observatory LIGO has seen a signature that looks like the merger of primordial (pre-stellar, big bang (not big band!) era) black holes. If confirmed with future observations, this…
Supermassive Black Holes Supersoaking Other Galaxies
Supermassive black holes can be terrible neighbors. New research shows that their powerful jets of charged particles can shut down star formation in neighboring galaxies within the galaxy cluster,…
Snowball Earth was Cold and Scary and the Milky Way Magnetic Field is a Mess
The Earth spent some crazy amounts of time (tens of millions of years) completely frozen over. And not, in the grand scheme of things, all that long ago. New research shows the ocean was salty and…
Planetary Nebulae and Active Asteroids Get a Closer Look
There's always been a fuzzy line between asteroids and comets, and new observations of asteroids in the vicinity of Jupiter provide a hint to the origin of the mysterious active asteroids that look…
A Dark Universe Unveiled
Scientists head to the volcanic fields of Iceland to test instruments for the VERITAS mission to Venus, Artemis II is ready for its historic flight to the Moon, and the Dark Energy Survey reveals the…
Crazy Spinners in the Asteroid Belt and S8 Tension
The amazing discoveries from the Vera C. Rubin Observatory have already started, and the astroquarks take a look at some close to home. Asteroids bigger than a city block spinning in fewer than 5…
Cosmic Rays from Everywhere and Stringy Ancient Galaxies
The Parker Solar Probe flies through the Sun's corona, MAVEN has gone silent, and new data shed light on the origins of cosmic rays. JWST's observations of ancient galaxies reveal odd shapes that may…
Interstellar Star Scars and Poop on Mars
We explore the dining and drinking choices for astronauts, complex chemicals discovered in asteroid samples, and untangling the web of scars in the local interstellar cloud to reveal past encounters…
Gravothermalizing and Baby Black Holes
There's a new funky proposal for small black holes in the early universe, and another potential dark matter candidate. Learn about cannibal stars and much more, together with double trivia and space…
An Ancient Moon of Mars?
The story behind this investigation is almost more cool than the discovery itself. Microlayers of sediments in Mars' Gale Crater, observed by NASA's Curiosity rover, are indicative of tidal sloshing…
Why Is There A Universe At All?
Things would be a lot simpler and a lot less interesting if charge parity existed in the universe, but there would be no one to appreciate that simplicity because we would not exist! New results from…
The Amazing and Crazy Story of Gemini and Jumbo Black Holes
The astroquarks are joined by Jeffrey Kluger, editor at large at Time Magazine and author of 13 books including Apollo 13 and the new book on the Gemini program. Tune in to hear about some of the…
Rings Around a Comet, Betelbuddy, and Odd Jupiter Moons
These rings aren't around Uranus, they're somewhere even more odd. We discuss the mysterious and changing ring system around the Centaur object Chiron, new clues about the origin of the solar system…
Adaptive LIGO and a New Look at an Old Crater
Adaptive optics techniques get applied to the mirrors in the LIGO gravitational wave observatory, promising a five-fold or greater improvement in sensitivity to gravitational waves from colliding…
Einstein Cross Reveals Dark Matter and a Life-y Mars Rock
We take a look the Cheyava Falls rock on Mars, or rather the Perseverance rover took a look at it, and we discuss what it saw which were some intriguing mineral formations that could have a…
Exo-Pluto Debris in Our Solar System and Axions Galore
An interstellar interloper may have been a chip off the old block, where the old block was a Pluto-like planet around another star, and the chip is solid air (nitrogen that is)! And we revisit the…
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Walkabout the Galaxy has published 366 episodes since November 2015, covering topics in Comedy, Natural Sciences.
Walkabout the Galaxy is currently highly active with new episodes every 2 weeks. Average episode length is 45m.
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