How is it that galaxies merge and collide but the universe is expanding and everything is moving away from everything else?

American astronomer Edwin Hubble (after whom the Hubble Space Telescope is named) coined the term “Local Group” for the galaxies he had identified as moving through space with the Milky Way. The term ...

"This is useful to uncover leftovers from galactic interactions, constraining the hierarchical process of cosmic structure formation." When you purchase through links on our site, we may earn an ...

For nearly a century, astronomers have known that the universe is expanding. Most galaxies are carried outward with the flow ...

Most of the universe is slipping away from the Milky Way, carried outward as space itself expands. Yet one giant neighbor is bucking the trend, racing straight at us while almost every other major ...

The largest sample of galaxy groups ever detected has been presented by a team of international astronomers using data from the James Webb Space Telescope (JWST) in an area of the sky called COSMOS ...

An artist's concept depicts the Milky Way galaxy and its spiral shape. Our solar system is located in one of the spiral arms. - NASA/JPL-Caltech Sign up for CNN’s Wonder Theory science newsletter.

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. A collision between ...