Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

A possible new dwarf planet has been discovered at the edge of our solar system, so far-flung that it takes around 25,000 years to complete one orbit around the sun. The object, known as 2017 ...

Earth has a newly-discovered neighbor in the solar system. But the heavenly body – possibly a dwarf planet à la Pluto – isn't a frequent visitor. Located beyond Neptune, its extreme orbit ...

In December 2003, the Hubble Telescope spotted something peculiar on the surface of Ceres, a dwarf planet in the asteroid belt between Mars and Jupiter. Hazy images revealed something bright and ...

Scientists at the Institute for Advanced Study in Princeton, New Jersey, discover a new trans-Neptune Object, 2017OF201, potentially discrediting 2016 theory of Planet Nine.

All 19 detections of the dwarf planet 2017 OF201, from August 2011 to October 2018. Credit... Cheng et al., arxiv.org, 2025. By Kenneth Chang.

Some scientists think they discovered a new dwarf planet at the edge of the solar system, so far away that it takes around 25,000 years to complete one orbit around the sun. Astrophysicist Dr. Paul ...