Trans-Neptunian objects (TNO) are some of our solar system's lesser-known objects. They number in the thousands, and they get ...

Astronomers have discovered an object at the edge of the solar system that is locked in a strange rhythmic dance with the ice giant Neptune.

In a groundbreaking discoverypublished in The Planetary Science Journal, a team of astronomers led by the Center for ...

Despite the powerful telescopes that modern astronomers have to work with, the distant reaches of the Solar System are still ...

Astronomers just found a distant space rock called 2020 VN40, orbiting the Sun way out past Neptune. This icy object takes about 164 years to make one lap around the Sun—talk about a long trip! The ...

A team of astronomers led by the Center for Astrophysics | Harvard & Smithsonian has discovered a rare object far beyond ...

"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today ...

For reference, Pluto’s average distance from the Sun is about 40 AU, so 2023 KQ14 is quite distant. At 23.4 billion miles (37 ...

Harvard & Smithsonian have discovered a rare trans-Neptunian object, 2020 VN40, orbiting in perfect sync with Neptune.

Our solar system has a mysterious new object! Trans-Neptunian body takes nearly 300 years to travel around the sun - and could help in the search for Planet Nine, astronomers say.

The trans-Neptunian object Arrokoth, also known as Ultima Thule, which NASA's space probe New Horizons passed on New Year's Day 2019, may have changed its shape significantly in the first 100 ...