Andromeda has slowed its star-forming rate over the last 40 million years. Scientists think they finally know why.

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 ...

Andromeda is the nearest major galaxy to the Milky Way, yet every view of it is ancient. The light reaching Earth tonight ...

For years, astronomers have predicted a dramatic fate for our galaxy: a head-on collision with Andromeda, our nearest large galactic neighbor. This merger—expected in about 5 billion years—has become ...

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 ...

NASA's Hubble telescope reveals the Andromeda Galaxy has been forming fewer new stars for 500 million years. Here's why the ...

The Milky Way and Andromeda have appeared locked on a destructive course for decades. Now, thousands of simulations suggest ...

A recent paper reveals we're almost certainly going to collide with a galaxy in the next couple billion years, but it's not the one we thought. Reading time 2 minutes For over a decade, researchers ...

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Scientists discovered the Andromeda galaxy, known as M31, hundreds of years ago, and around a century ago, we realized that it had negative radial velocity toward the Milky Way. In other words, ...

A group of astronomers has discovered the smallest, dimmest satellite galaxy bordering the Milky Way’s nearest galactic neighbor, the Andromeda Galaxy. The itsy-bitsy satellite galaxy is named ...

According to Australian National University, there is now sufficient evidence (albeit in the form of very faint traces) of several small galaxies that Andromeda has been devouring, possible as long ...