If confirmed, the rock would become just the second world past Neptune in our solar system to host an atmosphere.

A scrawny dwarf planet nicknamed the Goblin has been discovered well beyond Pluto. A round frozen world just 186 miles (300 kilometers) across, the Goblin was spotted by astronomers in 2015 around ...

A new study suggests that a tiny, icy world beyond Pluto harbors a thin, delicate atmosphere that may have been created by volcanic eruptions or a comet strike.Related video above about PlutoJust 300 ...

New Horizons spacecraft survives trip 1 billion miles beyond Pluto 02:03 A new study suggests that a tiny, icy world beyond Pluto harbors a thin, delicate atmosphere that may have been created by ...

What is Planet Nine, and where is it? The question has fascinated astronomers for years. Scientists believe a massive undiscovered planet may exist in the outer Solar System. Although no telescope has ...

A new study suggests that a tiny, icy world beyond Pluto harbors a thin, delicate atmosphere that may have been created by ...

A tiny, little-known world beyond Pluto appears to have an atmosphere, Japanese astronomers said Monday, defying what had been thought possible for icy objects in our cosmic backyard. If confirmed, ...