A newly discovered dwarf planet called 'Ammonite' (2023 KQ14) has been spotted in the outer solar system, and it could be another nail in the coffin for the Planet Nine hypothesis.

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

The newly discovered world — a "sednoid" — challenges what planetary scientists thought they knew about the edge of the solar ...

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