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

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. There's some other places to check us out! sites to listen to our podcast: https://walkaboutthegalaxy.libsyn.com/ https://podcasts.apple.com/us/podcast/walkabout-the-galaxy/id867430953 https://open.spotify.com/show/4TqNDqt9aV3LRJ7BCt0Oob?si=aaac77bc46fa444e You can also find us on google podcast as Walkabout the Galaxy