"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 ...

A nebula that neighbors the Milky Way galaxy happens to be a powerhouse of forging stars, "a bouquet of thousands of stars in ...

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small ...

Around 2015, astronomers took on the painstaking task of stitching together Hubble Space Telescope images of this galaxy, but that effort had focused on the galaxy's northern half. Still, however, the ...

The Andromeda Galaxy, also known as Messier 31 or M31 ... Hubble can only detect stars that are brighter than our Sun, and many low-mass stars fall below its sensitivity threshold.

Astronomers predict that our home galaxy and the nearest major galaxy to it, Andromeda (2.5 million light-years away), will collide and eventually merge between 3.9 billion and 5.6 billion years ...

Astronomers spent a decade compiling this special image with the Hubble Space Telescope and then stitched together 600 photos ...

The Hubble Space Telescope has produced the most comprehensive survey of the Andromeda galaxy, revealing new clues about its history. The Hubble survey, assembled from over 1,000 orbits and ...

His remark holds true now, nearly half a decade later. At 2.5 million light-years away, the Andromeda Galaxy—officially called Messier 31—is the farthest object visible to the naked eye.