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

Astronomers have detected a thin atmosphere around trans-Neptunian object (612533) 2002 XV93, a finding previously thought ...

The finding offers fresh insight into our solar system’s farthest, coldest objects in a region known as the Kuiper Belt.

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

In the far reaches of our solar system - beyond the outermost planet Neptune - resides a host of icy and desolate celestial ...

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

A 500-kilometre-wide object in a similar orbit to Pluto challenges our assumptions about small bodies in the outer solar ...

There may be a warp in the Kuiper Belt, possibly caused by “Planet Y” — a Mercury-to-Earth-sized world that orbits the sun way beyond the orbit of Neptune. Is there a mysterious “Planet Y” orbiting ...

A new study from BYU professor of physics and astronomy Darin Ragozzine and former undergraduate student Maia Nelsen provides new insight into the structure of objects in the Kuiper Belt. Using data ...