For more than a decade, the collision between the Milky Way and Andromeda galaxies has been treated as a settled fact of ...

The Andromeda Galaxy (M31) is the largest member of the Milky Way’s gang of galactic neighbors, known as the Local Group. With around a trillion suns worth of mass, Andromeda’s gravitational influence ...

A Hubble Space Telescope optical image of our nearest neighbor galaxy, Andromeda (M31), with an inset X-ray image of the active center made with the XMM-Newton observatory. The newly discovered ...

A new view of the Andromeda Galaxy reveals hot, young stars in ultraviolet light. Subscribe to read this story ad-free Get unlimited access to ad-free articles and exclusive content. NASA's Swift ...

Exciting new simulations reveal that our Milky Way could gracefully dodge a direct encounter with Andromeda. What once seemed ...

How many times has someone asked you, “What’s the farthest thing you can see with your eyes?” Me? I’ve long lost track. But my stock answer is always the same, the Andromeda Galaxy (M31). Unless you ...

Go into your backyard about 20:30 p.m. EST or thereabouts this weekend and you can see the most incredible thing – the Andromeda Galaxy – one of the farthest objects visible to the naked eye. If you ...

The 2011 Brit Marling sci-fi film Another Earth posited the idea of a mirrored version of Earth entering the Milky Way. The idea seems preposterous, and it probably is–in the film, the “other Earth” ...

Newly forming stars glow fiery bright in this infrared image of the Andromeda Galaxy taken by the European Space Agency's Herschel spacecraft. The galaxy's spiral structure, which is similar to that ...

This image from WISE displays the Andromeda galaxy's older stellar population in blue. The disk of the galaxy shows the aftermath of a collision with another galaxy, clear from the warp in the spiral ...