Most stars are like long-distance marathon runners, as they are constantly moving in space throughout their lifetimes.

This object is a pulsar, the spinning dense core that remains after a massive star has exploded and collapsed.

Astronomers had to combine observations made with two space telescopes to create this photo.

This galaxy, at a distance of about 12 million light years from Earth, contains a gargantuan jet blasting away from a central supermassive black hole.

Light from the nearest star outside our solar system has to travel through empty black space for 4.2 years before it reaches our eyes.

Magnetars are some of the most extreme objects known in the Universe. These stars were given their name because they are very strong magnets.

In the middle of the twentieth century, an unusual star was spotted in the constellation of Canes Venatici.

The Chandra images included in this brief 2013 retrospective are drawn from dozens of images.

About once or twice every 100 years, a gigantic nuclear bomb detonates in our Galaxy.

It seems that there is a twist in nature: the more beautiful something is, the more deadly it also might be.