Astronomers at the University of Michigan have discovered a new satellite of the Andromeda Galaxy (M31), the Milky Way's closest major galactic neighbor, and it has broken the record for the faintest ...

An international team of astronomers has identified two new tidal streams in the Andromeda Galaxy, the remnants of dwarf galaxies consumed by our large galactic neighbor. Analysis of the stars in ...

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

A team of astronomers from Tohoku University, University of Tokyo, NAOJ, University of California Santa Cruz, and other universities (note 1) have discovered new stellar streams in a vast region ...

There’s a growing body of evidence that galaxies grow large by merging with other galaxies. Telescopes like the Hubble have captured dozens of interacting galaxies, including well-known ones like Arp ...