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

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

By Will Dunham WASHINGTON, May 4 (Reuters) - In the far reaches of our solar system - beyond the outermost planet Neptune - ...

Astronomers have confirmed, for the first time, a trans-Neptunian object with a thin atmosphere—something previously thought ...

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

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

Scientists at the Rubin Observatory have identified nearly 11,000 asteroids, including hundreds beyond Neptune and 33 previously unknown near-Earth asteroids.

An "interstellar object" is speeding toward the inner solar system, where Earth is located, astronomers have confirmed. The object -- likely a comet -- was first detected in data collected between by ...

An interstellar comet carries water unlike anything in our solar system, revealing a far colder birthplace and clues about ...

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Earlier this summer, astronomers discovered something strange whizzing past Jupiter: an interstellar object. Scientists named it 3I/ATLAS. It’s only the third interstellar object ever observed, and it ...