Astronomy

Although astronomers have found thousands of exoplanets, the number of confirmed exomoons—and exorings—is still zero. But that may soon change

Asteroids, exploding stars, and feasting black holes swarm in the first-ever batch of nightly alerts from the Vera C. Rubin Observatory in Chile

Astronomers captured this stunning image of the Milky Way’s center, revealing a web of gas, dust and stars in extraordinary detail

A baby sunlike star blowing a bubble of hot gas called an “astrosphere” was captured for the first time by NASA’s Chandra X-ray Observatory

Fresh observations from the James Webb Space Telescope show how vivid auroras surge through Uranus’s tilted magnetic field

On Thursday the U.S. president ordered the release of federal files related to UFOs and aliens, although no evidence of extraterrestrials visiting Earth is known to exist

How big would a telescope need to be to see Earth’s dinosaurs from 66 million light-years away? Think big—and then think bigger

Astronomers are racing to understand mysterious ancient objects that pepper James Webb Space Telescope images

The collision of supermassive black holes shakes the entire cosmos, hard

Four worlds around a small, dim star are challenging theories of planet formation

A “disappearing” star in the Andromeda galaxy is the closest and best candidate for a newborn black hole that astronomers have ever seen

BlueBird 6 features the biggest commercial communications array antenna ever deployed in orbit around Earth, spanning some 2,400 square feet