A 'Ghost Galaxy' May Have Given the Milky Way Its Signature Swirl
The Milky Way's edge is still wobbling due to a collision with a dwarf galaxy loaded with dark matter.
A Newly Discovered Type of Galaxy Keeps Producing Stars as It Dies
'Cold quasars' offer an unprecedented look at the transition between active star-forming galaxies and dead galactic bodies.
The Milky Way Ate This Star Cluster Billions of Years Ago
The Hubble Space Telescope snapped detailed images of Messier 75, which is part of the 'Gaia Sausage.'
Hubble Captures Image of Galaxies Colliding 230 Million Light Years Away
The picture is a preview of the impending collision between the Milky Way and Andromeda galaxies in four billion years.
Colliding Galaxies Left a Stream of Gas 2.6 Million Light Years Long
It's by far the longest gas trail ever discovered, and it weighs more than the Milky Way and Andromeda combined.
This Is What Happens When Galaxies Collide
The Andromeda galaxy is on a collision course with the Milky Way and there's no escape.
Amy Shira Teitel