Nature photographers and other fans of planet Earth always look forward to the blue hour.

Telescopes can only bring Saturn's day into view.

These cosmic dust clouds drift some 1,300 light-years away along the fertile starfields of the constellation Cepheus.

Massive stars in our Milky Way Galaxy live spectacular lives.

Few cosmic vistas excite the imagination like the Orion Nebula!

The two appear separated by only half a degree on the sky, but they actually lie at quite different distances.

Is this a painting or a photograph?

What's happening above that volcano?

By the turn of the 20th century advances in photography contributed an important tool for astronomers.

This single, 251-second long exposure follows the early flight of an Atlas V rocket on August 8.