In a landmark study, scientists using NASA’s Hubble Space Telescope have mapped the immense envelope of gas, called a halo, surrounding the Andromeda galaxy, our nearest large galactic neighb… ...

At about 2.5 million light-years away, Andromeda is the closest major galaxy to our own, and getting closer; Andromeda and the Milky Way are predicted to collide and merge in about 5 billion years ...

This sky map shows how to find the constellation Andromeda high above Jupiter. The constellation is home to the Andromeda Galaxy, which appears as a fuzzy patch above the star Mirach (labeled here ...

Located at a distance of 2.5 million light-years, the Andromeda Galaxy is readily visible to the unaided eye on dark, ... once reported that it also appeared on a Dutch star map from the year 1500.

Andromeda's halo helps put that time and space into perspective on the cosmic scale: These new maps reveal the halo extends some 1.3 million light-years out from the galaxy — about halfway to ...

“We can tell it’s got this big central bulge of older stars and a star-forming disk that’s not as active as you might expect given the galaxy’s mass.” Astronomers refer to the Andromeda Galaxy as M31 ...

Someday, the Andromeda Galaxy will merge with our Milky Way – and it won’t be the first time Andromeda has swallowed up another galaxy and kept the stars for itself.

Professor Puragra “Raja” GuhaThakurta and Ph.D. student Douglas Grion Filho were among the astronomers from UC Santa Cruz who collaborated on the effort, which resulted in the largest mosaic of Hubble ...

Today, astronomers have measured the distance to the Andromeda Galaxy much more precisely; they find it to be about 2 1/2 million light years away. It is a majestic spiral-shaped galaxy, similar to ...

Maps of stellar motions can show whether the Milky Way will someday merge with the Andromeda galaxy—and a whole lot more By Phil Plait edited by Lee Billings The Andromeda galaxy.

Striking new evidence for a mass immigration of stars into the Andromeda Galaxy has been uncovered by researchers led by astronomers at NSF’s NOIRLab. The team used the DOE’s Dark Energy ...