The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

Tucson's Planetary Science Institute contributes to tracking mystery space objects that help reveal secrets of the solar ...

KQ14, nicknamed "Ammonite", was discovered using the Subaru Telescope and is a highly elliptical object with a perihelion and ...

Trans-Neptunian objects (TNO) are some of our solar system's lesser-known objects. They number in the thousands, and they get their name from their orbits. These dwarf planets orbit the sun at a ...

Astronomers have made an extraordinary discovery at the outer edge of our solar system—a strange space rock that dances in ...

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

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.

Astronomers have found 2023 KQ14, nicknamed Ammonite, a rare sednoid with a unique orbit that challenges the Planet Nine hypothesis.

Learn more about a sednoid called Ammonite that has been detected in the outer reaches of the Solar System.

According to study co-author Dr Fumi Yoshida, Neptune is the only known massive object near the outer Solar System that could ...

Extreme trans-Neptunian objects and the Kozai mechanism: signalling the presence of trans-Plutonian planets. Monthly Notices of the Royal Astronomical Society: Letters , 2014; 443 (1): L59 DOI: 10 ...

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 ...