Astronomers studying the Milky Way's oldest stars have estimated that the Universe is about 13.6 billion years old.

The oldest stars in the Milky Way are forcing a fresh look at one of cosmology’s biggest arguments. If some of them are about ...

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 ...

Astronomers produced the most complete map of the center of the Milky Way, which can provide insight into how stars and planets are formed.

A team of astronomers led by researchers at the University of Groningen has identified a colossal sheet of dark matter and ...

On a clear night, the Milky Way and the Andromeda galaxy look like close neighbors. In space, they really are. Andromeda is even heading your way at about 100 kilometers per second. Now astronomers at ...

In recent years, one of the most troubling puzzles in astrophysics has grown more urgent. Scientists have realized that the universe seems to be expanding faster than expected, throwing a wrench into ...

Add Yahoo as a preferred source to see more of our stories on Google. The mystery of galaxies in the early Universe just got even weirder. A team of astronomers has identified a giant spiral galaxy so ...

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?

In this combination of images from NASA/ESA shows three future scenarios for Milky Way & Andromeda encounter. Top left: Galaxies bypass at 1 million light-year separation. Top right: At 500,000 ...

Most of the (dark) matter beyond the Local Group of galaxies (which includes the Milky Way and the Andromeda Galaxy) must be ...