Walkabout the Galaxy Author: Joshua Colwell, Adrienne Dove, and James Cooney An irreverent and informative tour of the latest, greatest, and most interesting discoveries in astronomy. Be a guest on this podcast Language: en Genres: Comedy, Natural Sciences, Science Contact email: Get it Feed URL: Get it iTunes ID: Get it Get all podcast data

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An Ancient Moon of Mars?
Episode 411
Wednesday, 26 November, 2025

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 of water in the lake that once filled the crater. Problem is, the age of the rocks and the magnitude of the tides would require a different moon than the ones currently there. Cool! Join us to hear about that, interstellar comet 3I/Atlas, and much more.

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