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

A team of astronomers led by the Center for Astrophysics | Harvard & Smithsonian has discovered a rare object far beyond Neptune, from a class known as trans-Neptunian objects, that is moving in ...

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

New evidence suggests that billions of years ago, a star may have passed very close to our solar system. As a result, ...

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

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 ...

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 ...

In addition to the newly reported trans-Neptunian objects, Sheppard and Trujillo also discovered another in 2014, which they nicknamed "Biden," after the American Vice President.