Hypervelocity stars (HVSs) were first theorized to exist in the late 1980s. In 2005, the first discoveries were confirmed.

An international team of researchers has found dark matter dominating the halos of two supermassive black holes in galaxies roughly 13 billion light years away. Their study, published in The ...

A blue dwarf galaxy pitched through the bullseye's galactic neighborhood 50 million years ago, leaving behind nine glittering rings.