A nebula—which comes from the Latin word for cloud—historically refers to something in the night sky that is not a planet or a comet. In short, a fuzzy blob in telescopes until the 20th century.

The Ring Nebula, also known as Messier 57, is more than 2,000 light years away, in the Lyra constellation. Discovered in 1779 by a French astronomer, it doesn't take a fancy instrument for an ...

Once in a while, here on Earth, we’ll encounter a few other objects that — like planets — reflect the Sun’s light to appear visible either to our eyes or our telescopes: objects like satellites, ...

Trifid Triple TreatESO has released a new image of the Trifid Nebula, showing just why it is a firm favourite of astronomers, amateur and professional alike. This massive star factory is so named ...

Decades of constant X-ray emission from the Helix Nebula’s white dwarf suggest debris from a Jupiter-sized planet steadily rains upon the star.

On the evening of June 25, an unusual luminous phenomenon appeared in the sky. A bright plume, resembling a fleeting nebula, surprised many observers. The phenomenon, clearly visible from ...