It circles a 'failed star' like a moon would. But scientists aren't quite sure what to call it.

Astronomers directly imaged a Jupiter-mass object orbiting a brown dwarf 72 light-years away, making it the strongest candidate yet for the first known exomoon.

With tens of thousands more satellites headed for orbit this decade, researchers are testing whether AI and satellite-to-satellite learning can catch failures before they happen.

To find the new object, researchers looked for small wobbles in the brown dwarf, which are caused by the object that orbits it. “As exotic as it is, this system is truly unique and represents a ...

Since the first planet beyond our solar system was confirmed in the 1990s, astronomers have gone on to catalogue more than ...

Scientists have discovered a unique planetary system located 71 light-years away, featuring a red dwarf star orbited by a ...

Astronomers are homing in on a distant realm where the lines between star, planet, and moon are blurred. Researchers have ...

A newly discovered object in a distant solar system doesn't fit neatly into the current definitions of moon or planet.

What has eluded detection so far have been exosatellites: moons orbiting those remote planets. Our solar system is home to a ...

The object about 72 light-years away from Earth could be the first satellite discovered outside our solar system.

A rocky exoplanet 48 light-years from Earth has offered the 'strongest evidence yet' that other planets besides Earth could ...