Oort Cloud Spiral, the Color of Mars, and a New Dwarf Galaxy

from Walkabout the Galaxy · host Josh Colwell, Addie Dove, Audrey Martin

We take a look at the formation and structure of the Oort cloud of comets which is spherical at large distances but has a spiral structure in its inner regions. And, after all this time, there's a surprising twist on the nature of the iron mineral that gives Mars its reddish hue. Also hiding in plain sight is a dwarf galaxy in the neighborhood of the Andromeda galaxy, our largest companion galaxy. Join us for a discussion of these discoveries, trivia, space news and more.

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This episode was published on March 5, 2025.

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