Some of the largest galaxies in the cosmos aren't creating new stars. Now scientists finally think they know why.

Did humanity evolve too late to ever meet a galactic federation of intelligent life?

Galaxies seemingly lacking dark matter which threatened to rule out alternative ideas about what dark matter could be may actually be full of it, according to a second, in depth look.

Are two galaxies which seem to lack dark matter proof that dark matter must be a particle rather than a quirk of gravity at cosmic scales. Well, it's actually kind of complicated...

If you imagine galaxies as tranquil clouds of gas and dust, lit up by billions of pinpoints of light, a 3D map of the Milky Way and the details behind it will show you otherwise.

Astronomers discovered a large proto-supercluster that shows us just how quickly the universe we see today organized itself.

Astronomers weigh a black hole so massive, it wasn't born from an imploding star but from massive nebulae crushed by its own gravity.