Astronomers Compare the Milky Way to the Andromeda Galaxy to better Understand Galaxy Evolution

In a paper to be published in Astronomy and Astrophysics, available online now here, astronomers compare the Milky Way Galaxy to the Andromeda Galaxy (M31) in order to better understand the evolution of spiral galaxies. The Milky Way and the Andromeda Galaxy are the two best known galaxies of the cluster of galaxies to which we belong, simply known as the Local Group.