This gorgeous eight-hour exposure reveals the colors of stars as they make their way across the night sky, colors that can inform astronomers about the characteristics of each star.

Bright star Sirius and open star cluster, the Pleiades, are among the celestial objects in the image. (Image credit: B.G Boyd) Purple clouds rise into a starry night sky in this beautiful image.

The blue and green shows cosmic haze where clouds form; x-rays are shown in purple. Click through the gallery to see this week’s helping of the best the universe has to offer.

The simple answer to the question is the camera settings used to take most photos from the Moon weren’t designed to capture stars.

Classic novas typically appear in the night sky once a year at most, making the simultaneous appearance of two such events ...

NASA shares a photo of a cosmic dance between two stars that triggers thermonuclear explosions in deep space.

'Christmas Star' to grace the night sky this weekend How to see multiple phenomenons happening in space over the coming days.

The color of the sky depends on scattering light particles. Learn which factors influence this scattering to create a purple sky.

The Hubble Space Telescope released newly processed images on Friday -- and every one of the pictured galaxies, star clusters and nebulae can be seen through a backyard telescope. They won't look ...

NASA's top five images from space include AG Carinae, the Crab Nebula with X-rays, the Andromeda galaxy in infrared, and Cassiopeia, a supernova remnant showing elemental gases.

When a thin purple ribbon of light appeared and starting glowing, Bourassa immediately snapped pictures until the light particles disappeared 20 minutes later.

Citizen scientists, satellites and researchers solve the mystery of new purple lights in the sky. The lights, called STEVE, provide scientists insight into Earth's magnetic field.