The Crab Nebula is one of the most studied objects in the night sky. This version of the Crab Nebula combines data from three different telescopes.

This never-before-seen view of the turbulent heart of our Milky Way combines a near-infrared view from Hubble, an infrared image from Spitzer, and X-ray data from Chandra.

Cassiopeia A is a supernova remnant found embedded in the constellation that bears its name, which is known as the queen in Greek mythology.

The most distant galaxy cluster yet has been found some 10.2 billion light-years from Earth.

NGC 6240 is a system in which two supermassive black holes are a mere 3,000 light years apart, virtually nothing in astronomical terms.

This image from the Chandra X-ray Observatory reveals a wealth of exotic objects and high-energy features at the center of our Milky Way galaxy.

This composite image of the Hydra A galaxy cluster shows 10-million-degree gas observed by Chandra and jets of radio emission observed by the Very Large Array.

A new study from two of NASA's "Great Observatories" provides fresh insight into how some stars are born, along with a beautiful new image of a stellar nursery in our own Milky Way Galaxy.

In Florence, Italy, in the year 1609, the world changed. Using a small telescope, Galileo proved that the Earth is not distinct from the universe, but part of it. And he showed that there is much more to the universe than we see with the naked eye.

The supernova remnant known as E0102 was one of the targets that Chandra first observed after its launch in 1999.