These cosmic filaments contain 12 trillion solar masses of 10-million-degree gas, helping solve the "missing matter" mystery.

This stunning Hubble view of spiral galaxy UGC 11397 captures more than graceful arms and glowing stars—it hides a ravenous ...

See how far away from each other the Skywalker twins were raised, where the Kessel run took Han Solo and more.

Travel back 390 million years after the big bang to the ancient Maisie's Galaxy in this stunning 3D visualization that ...

Inspired by superconductivity, a strange new theory that seeks to explain dark matter might explain dark energy, too ...