New discoveries of objects in the Kuiper Belt have also presented challenges for the Planet Nine theory. The latest is known ...

A lone body, making one passage around the Sun for every ten by Neptune, is rewriting the rules of planetary dynamics in the ...

A team led by Wang Shiang-yu (王祥宇) and Chen Ying-tung (陳英同) of the Institute of Astronomy and Astrophysics at Academia Sinica ...

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

SCOTS may be able to catch a glimpse of Pluto this week as it reaches peak brightness. The dwarf planet is set to be at its ...

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

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

Astronomers have discovered "Ammonite," a mysterious object on the solar system’s edge whose unusual orbit challenges current ...

This object is the first confirmed body that orbits the sun once for every ten orbits Neptune completes.