A radio telescope in South Africa has unearthed a giant galaxy—dubbed a "cosmic megastructure"—with plasma jets that measure ...

Hubble revealed a universe of galaxies that existed beyond ours — but he couldn't have done it without a little help.

In the years following the launch of NASA's Hubble Space Telescope, astronomers have tallied over 1 trillion galaxies in the universe. But only one galaxy stands out as the most important nearby ...

The universe really seems to be expanding fast. Too fast, even. A new measurement confirms what previous—and highly ...

Astronomers have achieved a groundbreaking feat by capturing the first clear image of a star in another galaxy. This ...

Learn about the size, temperature, and colour of each planet, and discover why Pluto is no longer considered a planet.

New ground- and space-based infrared observations are giving astronomers a better handle on the true populations of red ...

Astronomers have unveiled surprising new details about a small galaxy, NGC 300, challenging existing theories on galaxy ...

One of the first constellations amateur astronomers come to recognize, the Queen offers observers many worthy sights.

The magnificent Andromeda galaxy (Messier 31), stands out as the most important nearby stellar island to our Milky Way, and ...