This picture shows the aftermath of a collision between two huge groups of galaxies, which are called galaxy clusters.

Earlier this year, astronomers discovered one of the closest supernovas in decades.

To celebrate the 15th anniversary of Chandra X-ray Observatory, we have released four new images of supernova remnants.

Each of these four fabulous photographs shows the remains of an exploded star - called a supernova remnant.

In fifteen years of operation, the Chandra X-ray Observatory has given us a view of the universe that is largely hidden from telescopes sensitive only to visible light.

NGC 4258, also known as Messier 106, is a spiral galaxy like the Milky Way. This galaxy is famous, however, for something that our Galaxy doesn't have - two extra spiral arms that glow in X-ray, optical, and radio light.

A team of astronomers has used Chandra X-ray Observatory and XMM-Newton to study a large group of galaxy clusters with a surprising result.

This photograph shows the flamboyant spiral galaxy called Messier 51.

Like the Milky Way, the Whirlpool is a spiral galaxy with spectacular arms of stars and dust.

The galaxy is called ESO 137-001 and in reality it is hidden from our view by a thick fog of space dust.