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, ...

This finding established this PeVatron as a pulsar wind nebula type of cosmic ray source and is one of a few cases where scientists can identify the nature of PeVatrons.

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 Carina nebula is a turbulent cloud of gas, dust about 7,600 light-years from here, a birthplace and graveyard for some of the Milky Way’s hottest and most massive stars.

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 ...