A distant 'exomoon' the size of Jupiter is changing how we think about the cosmos.

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

Astronomers have discovered a rare planetary system 71 light-years away, where a Jupiter-sized world orbits a brown dwarf, ...

Have astronomers observed the first exomoon, or have they spotted a weird object that could challenge the very concept of planets and moons?

Barnard’s Star hosts four hostile small planets whose unusual chemistry and orbital rhythm reveal how compact planetary systems can form and survive.

Three confirmed interstellar objects have entered the Solar System in just eight years, including one that crossed the Sun at ...

August 2026 will give the inhabitants of the Earth the opportunity to see a rare large parade of planets — a phenomenon that ...

It’s easy to see Jupiter as you travel past Westfield in Aroostook County, but you might not notice the newest installation ...

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

A brown dwarf is wobbling on its path around a star in a manner that indicates it has its own giant satellite. This ...

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

A giant planet had been hiding inside one of astronomy’s most closely studied planetary systems, concealed by a bright disk of cosmic dust. Webb revealed Beta Pictoris d through atmospheric traces of ...