Hubble's optical stability ... The nearest galaxy of comparable mass to the Milky Way beyond Andromeda is M81, at nearly 12 million light-years. This bird's-eye view of Andromeda's satellite ...

Hubble's study reveals Andromeda experienced major galactic collisions, unlike Milky Way. Its satellite galaxies show unusual ...

This article was originally featured on The Conversation. A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the American ...

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 don't ...