It may be a “train wreck,” in the words of astronomer Dan Weisz, but it’s a beautiful train wreck.
Weisz, an associate professor of astronomy at the University of California, Berkeley, is referring to the Andromeda galaxy, the nearest large galaxy to our own Milky Way and the closest one that astronomers can study for clues to our galaxy’s evolution.
A mosaic image of the entire Andromeda galaxy (Messier 31, or M31), 2.5 million light years away but six times larger than the moon in the night sky, was released today (...