It is still not known why the Sun's light is missing some colors.

What can you see in the night sky this season? The featured graphic gives a few highlights for Earth's northern hemisphere.

Two small robots have begun hopping around the surface of asteroid Ryugu.

Does the Sun return to the same spot on the sky every day at the same time? No.

On the August 18 night flight from San Francisco to Zurich, a window seat offered this tantalizing view when curtains of light draped a colorful glow across the sky over Hudson Bay.

Irregular galaxy NGC 55 is thought to be similar to the Large Magellanic Cloud (LMC).

Cosmic dust clouds and young, energetic stars inhabit this telescopic vista, less than 500 light-years away toward the northern boundary of Corona Australis, the Southern Crown.

Inside the Cocoon Nebula is a newly developing cluster of stars.

There's a "camera" comet now moving across the sky.

How could a galaxy become shaped like a ring?