Neighbor galaxies had near miss in the past

Astronomers have confirmed the existence of a 'bridge' of hydrogen gas connecting two of our neighboring galaxies, indicating that they may once have brushed together.

Milky Way set for head-on crash with Andromeda galaxy

Look out: we're headed for a crash. In, ooh, just four billion years or so our Milky Way galaxy is set to collide with neighboring Andromeda.

Stellar mass black hole found in Andromeda

A study of X-rays emitted a long time ago in a galaxy far, far away has positively identified a stellar mass black hole in Andromeda, a spiral galaxy located about 2.6 million light-years from Earth.