Astronomers have discovered the brightest and most distant "megamaser" to date. The cosmic energy beam is shooting toward ...

Astronomers have spotted a galaxy so faint, it’s almost invisible — a discovery that could help illuminate one of the most ...

A razor-thin spike of radio light, tuned to a wavelength of about 18 centimeters, just traveled more than 8 billion ...

The Vera C. Rubin Observatory has started releasing its first discoveries: including supernovae, variable stars and asteroids ...

A galaxy made almost entirely of dark matter, an elusive form of matter that doesn’t interact with light, was spotted by ...

Cosmic voids are different. These vast expanses contain very little matter. In such places, the vacuum of space-time itself becomes the dominant component. If you were positioned at the center of a ...

The researchers said that the "hydroxyl gigamaser" was generated by the merger of two galaxies some 8 billion light-years ...

Last year, our most detailed map of the universe yet suggested our understanding of dark energy has been wrong for decades.

Astronomers using the MeerKAT radio telescope in South Africa have discovered the most distant hydroxyl megamaser ever ...

A subtle gravitational-wave “hum” from merging black holes may help settle the cosmic fight over how fast the universe is ...

Astronomers use telescopes to look back in time and observe stars and galaxies as they were millions and billions of years ...

Astronomers have long known the universe is expanding—but exactly how fast remains one of the biggest mysteries in cosmology. Different techniques for measuring the Hubble constant stubbornly disagree ...