One of the most complicated and dramatic collisions ever seen between galaxy clusters is captured in this new composite image.

This image is what is known as the Chandra Deep Field South, a 4-million-second exposure made by NASA's Chandra X-ray Observatory.

Located in the Sagittarius-Carina arm of the Milky Way a mere 7,500 light years from Earth, the Carina Nebula is one of the best places to study how massive stars live and die.

New research using Chandra data of the Tycho supernova remnant provides astronomers with clues to what triggered the original supernova explosion.

Like looking for Easter eggs in a lawn of long grass, the hunt for the Milky Way's most massive stars takes persistence and sharp eyes and powerful telescopes that can see different types of light.

Over four hundred years ago, the Danish astronomer Tycho Brahe studied the explosion of a star that later became known as Tycho's supernova.

A new discovery from a famous exploded star has provided the first evidence for a bizarre state of matter in its core.

This image shows Arp 147, a pair of interacting galaxies some 430 million light years from Earth.

GRS 1915+105, or GRS 1915 for short, is a special system. Not only does it contain a black hole some 14 times more massive than the Sun in orbit with a companion star, it also has a heartbeat.

The youngest known black hole in our cosmic neighborhood may have been found using NASA's Chandra X-ray Observatory and other telescopes.