Located 2.5 million light-years away, the majestic Andromeda galaxy appears to the naked eye as a faint, spindle-shaped object roughly the angular size of the full moon. What backyard observers ...

The Andromeda galaxy is also known as Messier 31. It is a spiral galaxy located about 2.5 million light-years from Earth. On ...

“For example, Chandra’s X-rays reveal the high-energy radiation around the supermassive black hole at the center of M31 as ...

The Hubble Space Telescope used quasars to make the most precise map of a galactic halo ever and realized that the Andromeda galaxy's influence stretches into that of our own Milky Way.

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

Researchers using the Hubble Space Telescope have mapped out the enormous halo of gas around the nearest major galaxy to us, the Andromeda Galaxy. Skip to main content. Menu ...

The Andromeda Galaxy, the Milky Way's closest galactic neighbor, glows brightly in a new Hubble Space Telescope image with swathes of ionized gas that fuel star formation.

Hubble's sharp imaging capabilities can resolve more than 200 million stars in the Andromeda galaxy, detecting only stars brighter than our Sun. They look like grains of sand across the beach. But ...

Andromeda, officially known as Messier 31, or M31, is located about 2.5 million light-years away from the Milky Way — which would make it our closest fellow spiral galaxy.

SEATTLE — The Hubble Space Telescope has captured an amazing new photo of the Andromeda Galaxy. The new mosaic image represents the sharpest and largest mosaic image of the Milky Way's galactic ...

Scientists previously predicted the pair of galaxies would merge in about five billion years. Now, research suggests that ...