Researchers have long thought that the Milky Way would collide with the Andromeda galaxy in four to five billion years. This scientific illustration depicts Earth's horizon four billion years in the ...

The team found only a 2 percent probability that the galaxies will collide in the next five billion years. In slightly over half of the simulated scenarios, Andromeda and the Milky Way experience at ...

A sheet of dark matter lying beyond the boundary of the Local Group is responsible for this.

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 ...

For nearly a century, astronomers have known that the universe is expanding. Most galaxies are carried outward with the flow of space itself. Yet one stubborn exception has lingered in our cosmic ...

A vast, flat sheet of dark matter may solve the long-standing mystery of why our neighboring galaxy Andromeda is speeding toward us while our other neighbors are moving away from us.

This illustration shows the location of the 43 quasars scientists used to probe Andromeda's gaseous halo. Quasars are extremely distant, brilliant cores of galaxies powered by star-eating black holes.

It turns out that looming collision between our Milky Way and Andromeda galaxies might not happen after all. Astronomers reported Monday that the probability of the two spiral galaxies colliding is ...

There's a 50% chance that the predicted head-on collision will end in a galactic merger, according to a new study. Reading time 2 minutes For decades, astronomers have predicted that, in approximately ...

The Andromeda galaxy, left, is about to collide with part of the Milky Way, as seen from Earth, in a hypothetical merger scenario. Credit: NASA illustration "Based on the best available data, the fate ...

For years, astronomers have believed that the fate of the Milky Way was tied to our largest neighboring galaxy, the Andromeda galaxy. However, a new study now says that this future Milky Way merger ...