The cold and remote planets originally earned their label of "ice giants" to contrast their interiors from those of Jupiter ...

The James Webb Space Telescope has caught a distant world in the act of falling apart, its outer layers peeling away into ...

We actually know very little about what's going on inside Uranus and Neptune, causing researchers to propose that these planets be called "rocky giants" instead. Astronomers have long called Uranus ...

A new probe in development known as GIRO represents a low-cost step toward unlocking the secrets of the outer planets, all through the invisible pull of gravity. Engineers have designed a compact, ...

A possible new dwarf planet has been discovered at the edge of our solar system, so far-flung that it takes around 25,000 years to complete one orbit around the sun. The object, known as 2017 OF201, ...