Walkabout the Galaxy
cosmic microwave background, CMB, Planck spacecraft
Astrophysics and Astronomy | Physics
The universe began in a hot, dense state, as the song goes, and we can, oddly, see that heat from the thing that we are still in. The universe. Strange stuff. The radiation leftover form the big bang, known as the cosmic microwave background, or CMB, has cooled off, but analysis of measurements of this radiation by the Planck spacecraft point to some odd hot and cold halves of the universe. The astroquarks take a deep dive into the CMB, plus lots of new spaceflight news and of course your Walkabout trivia.
First brought to you by Kenneth Arnold in 1947, and adding a little sauce to the public imagination ever since, flying saucers gleefully fly in the face of logical designs for both airborne vessels and spaceships, lacking any form of lift or thrust. With a cockpit for one, and no room to stand, the flying saucer may not be a comfortable ride for your millenia-long travel through interstellar space, but when you get to your destination you'll at least be able to wow the locals with that classic 1950's UFO style! Flying saucers: Fly the Friendly Skies!
© Joshua Colwell, All Rights Reserved
Length of Episode
Colwell, Joshua; Dove, Adrienne; and Cooney, James, "The Universe is Running Hot and Cold" (2019). Walkabout the Galaxy Podcast. 83.