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

The finding comes with significant new suggestions about the solar system ...

Astronomers have identified another object from this realm, with a diameter of roughly 310 miles (500 km), that has an atmosphere - albeit a thin one.

A team of professional and amateur Japanese astronomers found evidence for a thin atmosphere around a small body in the outer ...

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 ...

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.

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

A tiny world that orbits way beyond Neptune surprised astronomers with a thin atmosphere that they did not expect to find. Now, scientists are trying to determine how it formed.

Astronomers detected signs of a thin atmosphere around distant object 2002 XV93, surprising scientists who believed it was ...

Astronomers have spotted something surprising in the far outer Solar System—a faint, short-lived atmosphere clinging to a tiny icy world that shouldn’t be able to hold one at all. The object, called ...