After cataloging thousands of worlds beyond our solar system, astronomers are now closing in on a far rarer prize: a moon ...

If not in visible stars and galaxies, the most likely hiding place for the matter is in the dark space between galaxies.

Nearly 4.5 million years ago, two enormous, blazing stars swung close to the solar system. They did not touch the sun, but ...

A team of astronomers using a variety of ground and space-based telescopes including the W. M. Keck Observatory on Maunakea, ...

Critics argue the satellites, billed as a way to harness solar energy at night, could hamper sky observations and may pose a ...

A network of powerful ground-based telescopes captured rare starspot-crossing events on TOI-3884b, revealing cooler patches ...

Astronomers capture the twinkle of a distant quasar, RX J1131, and reveal the secret size of a black hole's fiery corona.

Drawing on the University of Arizona’s renowned strength in interferometry, astronomers from Steward Observatory are leading ...

An international team led by the University of Oxford has identified one of the largest rotating structures ever reported: a ...

At least some evidence suggests that NGC 2775 developed its odd shape after merging with other galaxies eons ago. While not ...

Chile’s Atacama Desert is one of the darkest spots on Earth, a crown jewel for astronomers who flock to study the origins of ...

On November 28, 1967, astronomers found the first pulsar. A pulsar is a super-dense star that rotates super fast. As the ...