Walkabout the Galaxy
Mars Insight lander; Geotail; eclipses
Astrophysics and Astronomy | Physics
The Mars Insight lander detected an impact that produced a stadium-sized crater on the red planet, and the 30-year magnetospheric mission Geotail comes to an end. An experiment deep underground on Earth helps explain the puzzling composition of some of the oldest stars, and we explore the future of eclipses in our trivia. Catch up on all this, the latest space news, and more.
You leave your home at relativistic speeds for a several billion year jaunt around the universe only to discover that the expansion of space-time has ruined your careful route planning. That's why you need comoving distance. Automatically correcting the difference between any two points in the universe for cosmological expansion, comoving distance is your key to finding your way around the universe. Toss those proper distances in the galactic dust bin, and plan your next walkabout the galaxy, or the cosmos, with comoving distance. Comoving distance, let's go places (Toyota).
© Joshua Colwell, All Rights Reserved
Length of Episode
Colwell, Joshua; Dove, Adrienne; and Sargeant, Hannah, "Chasing Geotail and Martian Impacts" (2022). Walkabout the Galaxy Podcast. 224.