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

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

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

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 ...

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

The long-serving space telescope saw the third interloper to enter the solar system from beyond its limits late on Monday ...

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 ...

The other object is 2014 NX 65, which is definitely not resonant with Uranus but might have an inner 3:2 resonance with ...

A team of astronomers from Taiwan has uncovered promising evidence suggesting the existence of Planet 9, a hypothesized ...

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.