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

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

Discovered through the Formation of the Outer Solar System: An Icy Legacy (FOSSIL) survey using the Subaru Telescope in ...

A small team led by Sihao Cheng, Martin A. and Helen Chooljian Member in the Institute for Advanced Study's School of Natural Sciences, has discovered an extraordinary trans-Neptunian object (TNO ...

Its inclined orbit challenges current models of the outer Solar System. Discovered by an international team, this object ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. An artist's interpretation of a trans-Neptunian object. | Credit: Artwork: NASA, ESA, and G ...

"This is a big step in understanding the outer solar system," team leader Rosemary Pike from the Center for Astrophysics | ...

“Stellar Occultation by the Resonant Trans-Neptunian Object (523764) 2014 WC510 Reveals a Close Binary TNO,” Rodrigo Leiva et al., 2020 Sep. 28, Planetary Science Journal [https://iopscience ...

A team of astronomers discovered a strange object in the outer solar system that is in a resonant orbit with Neptune.

A new study from researchers at the Southwest Research Institute has unearthed a fascinating discovery about Arrokoth, a trans-Neptunian object made famous by the New Horizons probe in 2020.

This is an artist's concept of a craggy piece of Solar System debris that belongs to a class of bodies called trans-Neptunian objects (TNOs). Astronomers culling the data archives of NASA's Hubble ...