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

The curious minds at What If explore the physical realities and varying gravitational forces experienced when attempting to ...

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

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

Scientists are documenting a planetary system in the Milky Way that is so starkly dissimilar to our own solar system they are ...

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

A NASA probe peered beneath the surface of the most volcanic world in the solar system, revealing scorching heat rising from ...

The Maine Solar System Model has garnered attention — and tourists — for more than 25 years. Stretching from Topsfield in ...

Explore the amazing discovery of WASP-107b, a uniquely puffy exoplanet with a cotton-candy appearance, uncovered by NASA.

For centuries, telescopes have functioned as time machines, allowing astronomers to peer deep into the past. The farther they look into space, the farther back in time they see.

The newly found object, estimated to be roughly as massive as Jupiter, orbits a brown dwarf—a "failed star"—which in turn ...

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