A rare observation opportunity revealed the presence of a thin atmosphere around a small object beyond Pluto.

An atmosphere has been discovered on a distant trans-Neptunian object. Scientists did not believe that such tiny worlds could ...

Pluto was believed to be the only body beyond Neptune with an atmosphere. Now, a new discovery in our solar system is ...

The atmosphere is between 5 million and 10 million times thinner than Earth's atmosphere. A very small body, far from the sun in an icy outer realm of the solar system, has mysteriously grown an ...

WASHINGTON, May 4 (Reuters) - In the far reaches of our solar system - beyond the outermost planet Neptune - resides a host of icy and desolate celestial bodies. Among these objects, only the dwarf ...

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

Researchers have uncovered an unexpected phenomenon, dubbed the Zwan-Wolf effect, squeezing plasma "like toothpaste" in Mars' upper atmosphere.