A new 527-megapixel image captures two open star clusters, NGC 456 and NGC 460, orbiting our Milky Way galaxy. The image uses ...

The star is ultrabright, blue, and super hot because it consumes its fuel incredibly fast. Our Sun loses 4 million tons of itself per second, but Alnitak weighs 200 million tons less each second.

A rare breed of star recently discovered by the Hubble Space Telescope spins faster by feeding on its stellar siblings.

Blue stars are extreme in every way. They're the hottest, most massive and shortest-lived stars in the universe.

Warm summer nights are numbered across North America with the start of autumn right around the corner, but there will be several notable night sky events for stargazers to enjoy in August.

The new category of galaxies would be the third, falling outside the usual neat dichotomy of young, actively star-forming blue galaxies and their older, inactive red counterparts.

Traditionally, astronomers have grouped galaxies into two different categories: blue, which are young and actively forming stars, and red, which are older and have ceased star formation. Now ...

The second full moon of August — a phenomenon called a "blue moon'' — also will be of a rare super variety.

The brilliant blue-white star lighting up the red nebula Sh2-46 hints at a dynamic and possibly fleeting encounter that could reshape the nebula's appearance over time.

A U.K. space startup has revealed plans to launch its first satellite as part of SpaceX's rideshare program, ushering in what it claims will be a "new era of space research," where astronomy data ...

The explosion of a star, called a supernova, is an immensely violent event. It usually involves a star more than eight times ...

A powerful new telescope in Chile is set to transform astronomy, and its first pictures of stellar nurseries and galaxies ...