Spiral galaxies

Green Impact Andromeda’s star formation has been slowing down for 500 million years

A census of 200 million stars shows Andromeda’s busiest star-forming ring has been losing momentum.

Space Cosmic collision: The Milky Way once flipped by more than 90 degrees Joshua Shavit

Space ‘Space archaeologists’ use oxygen map to reconstruct a galaxy’s 12-billion-year past Joshua Shavit