Chandra

Beautiful images accompany a quick tour of the crab nebula in a new video released by NASA.

A swarm of thousands of black holes may surround the giant black hole at the heart of our galaxy, a new study finds.

Some of the most monstrous black holes in the universe are growing faster than their host galaxies, new research suggests.

Jupiter's northern and southern lights continue to dazzle — and puzzle — the scientists who study them, as highlighted in a new video from NASA.

Astronomers have pinpointed five pairs of merging black holes using three different space and ground-based instruments and two sky surveys.

Scientists detected gravitational waves from merging neutron stars. What have they become now?

A new video shows the explosive reaction when a dense stellar corpse sucks up material from a pulsating dead star.

A wave of hot gas twice as wide as the Milky Way galaxy roils the nearby Perseus galaxy cluster, a new study indicates.