The Andromeda Galaxy, located 2.5 million light years away, has fascinated observers for centuries. Once believed to be part of the Milky Way, everything changed in 1923 when Edwin Hubble identified ...

The Andromeda Galaxy, our closest galactic neighbor, just 2.5 million light-years away, has long captivated astronomers with ...

Particular stars called Cepheid variables allow astronomers to determine distance, and Hubble spotted one of these within M31 ...

When layered, they depict a vibrant and active galaxy reminiscent of our own—and the information is already helping experts expand on Andromeda’s ongoing life story.

Milky Way galaxy might not collide with Andromeda after all Astronomers ran 100,000 computer simulations using combined Hubble/Gaia space telescope data.

A collision between our Milky Way galaxy and the neighboring Andromeda galaxy, long considered inevitable, may be in question, astronomers say.

New data show a 50% chance the Milky Way won't collide with Andromeda. A merger with the Large Magellanic Cloud is far more likely.

Astronomers have long thought that the Milky Way is headed for an inevitable crash with its neighbor, Andromeda. But a new study complicates the story.

Our own Milky Way is part of a small galaxy group known as the Local Group, which includes the Andromeda Galaxy and dozens of smaller galaxies.

Shockingly Tiny Galaxy Near Andromeda Is Just One-Millionth the Size of the Milky Way The fully formed galaxy is remarkably teeny, raising new questions about how galaxies emerge and evolve.