A Michigan State University researcher saw X-rays coming from a black hole using the NASA Chandra X-Ray Observatory telescope ...

Andromeda XXXV is only about 20,000 times more massive than our Sun—very small, even for a satellite galaxy. For comparison, the Milky Way’s mass is about 1.5 trillion solar masses ...

The cluster, full of more than 2,500 newborn stars that blaze blue in the Hubble image, is in a galaxy with far fewer heavy ...

Fluffy strands of cosmic gas and dust illuminated by bright young stars form a beautiful cloudscape in a neighboring nebula.

Stargazers will be treated to overlapping meteor showers in April. From April 20 to April 26, both the Lyrids and Eta ...

"A hot white dwarf star, about the size of the Earth but having mass comparable with that of the sun ... in our galaxy — more are known beyond the Milky Way, most of them in the Andromeda ...

The last commands have been sent to the ESA's Gaia satellite and, after a dozen years scanning the galaxy, the spacecraft is ...