Astronomers have long known that the Andromeda galaxy, aka Messier 31, a swirling city-state of a trillion stars — plus all the accouterments of gas, dust, dark matter and black holes — is rumbling ...

Astronomers now believe the Milky Way's "inevitable" collision with a neighboring galaxy is much less likely than originally thought.

It turns out that looming collision between our Milky Way and Andromeda galaxies might not happen after all. Astronomers reported Monday that the probability of the two spiral galaxies colliding is ...

Despite the previous belief that our galaxy and the neighboring Andromeda would eventually merge in about 5 billion years, forming what they call Lactomed, a new analysis has reached a different ...