A dazzling cosmic swirl, NGC 3507 shines alone in this Hubble image, though it secretly belongs to a dynamic galactic duo.

Astronomers discover more than 100 hidden black holes in a star cluster, revealing surprising movements in ancient galactic ...

The mystery object, located just a short 15,000 light-years from Earth in our Milky Way galaxy, was spotted emitting unusual ...

Harvard astronomer Avi Loeb discusses the hypothetical use of highly energetic events as a way to produce "gravitational-wave ...

The Andromeda Galaxy (M31) is the closest large spiral galaxy to the Milky Way, visible to the naked eye and set to merge ...

Using combined observations from ground-based telescopes over nearly four years, the researchers saw the distant galactic ...

Astronomers have identified an extraordinary cosmic pattern in our celestial neighborhood: a stream of dwarf galaxies ...

While the Milky Way is technically visible year-round, certain times offer better viewing opportunities — especially for ...

Small companion galaxies around our neighboring Andromeda galaxy appear to stretch and point toward Earth in a fascinating ...

1. Andromeda Galaxy is the closest spiral galaxy at 2.5 million light-years, it’s massive, visible to the naked eye, and heading toward the Milky Way. 2. Triangulum Galaxy is a small ...

Andromeda, also known as M31, is the spiral galaxy closest to the Milky Way and, like our galaxy, is surrounded by a group of smaller dwarf galaxies that orbit around it. What has surprised scientists ...

All but one of M31's brightest 37 satellites are on the side of the Andromeda spiral that faces our Milky Way galaxy – the odd one out being Messier 110, which is easily visible in amateur ...