On Nov. 20, 1889, Edwin Hubble was born in Marshfield, Missouri. His 1923 observations of the Andromeda Galaxy and a Cepheid variable within it would vastly expand our understanding of other galaxies ...

For decades, astronomers wondered why most nearby galaxies are speeding away from the Milky Way instead of being pulled in by its gravity. New simulations reveal the answer: our galaxy sits in a ...

A new composite image of the Andromeda Galaxy is offering an unprecedented view of our closest spiral galactic neighbor. Composed by NASA and international space partners, the image combines data from ...

For centuries, people thought that the Milky Way was the edge of our universe. That was, until Edwin Hubble found a variable star in the Andromeda galaxy and we were able to literally expand our ...

For Hubble's 21st anniversary in 2011, NASA imaged Arp 273, a pair of galaxies some 300 million light-years away in the constellation Andromeda. UGC 1810 and UGC 1813 are another pair of so-called ...