A massive star in the Andromeda Galaxy has vanished. Over nearly a decade, astronomers watched as the brilliant supergiant faded from view until it became completely invisible. The star didn’t explode ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. This illustration shows a stage in the predicted merger ...

Add Yahoo as a preferred source to see more of our stories on Google. A hypothetical view from Earth as the Andromeda galaxy (on left) is about to collide with part of the Milky Way galaxy. Our Milky ...

Add Yahoo as a preferred source to see more of our stories on Google. Researchers have long thought that the Milky Way would collide with the Andromeda galaxy in four to five billion years. This ...

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 ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. When will the Milky Way collide with the Andromeda Galaxy?

The Andromeda galaxy is surrounded by a constellation of dwarf galaxies that are arranged in a highly lopsided manner. Analysis of cosmological simulations published in Nature Astronomy reveal that ...

An international team of astronomers reports the discovery of a new dwarf galaxy, which they have named Pegasus VII. The newfound galaxy, which lies about 2.4 million light years away, was identified ...

A close-up view of a prodigious number of stars in the Andromeda galaxy. Credit: NASA / ESA / B. Williams (U. of Washington) The Andromeda galaxy is a colossal marvel in our sky, hosting over 1 ...

Astronomers are celebrating the completion of a 2.5-billion-pixel panoramic picture of the entire Andromeda Galaxy. The team includes several UC Santa Cruz researchers who made significant ...

Andromeda lies 2.5 million light-years away from the Milky Way, a spiral galaxy similar to our own that has allowed scientists to better understand our galactic home. A new composite image reveals our ...

The Andromeda Galaxy is revealed in unprecedented detail in four archive observations from the NASA/ESA Hubble Space Telescope. They show stars and structure in the galaxy’s disk, the halo of stars ...