Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the ...

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

A rare celestial object beyond Neptune, 2020 VN40, moves in sync with Neptune, offering new insights into the outer solar system and fueling the search for Planet Nin ...

Japan's Subaru Telescope in Hawaii detected a faint, icy body. Now named 2023 KQ14, or Ammonite, it lies well beyond Pluto.

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 ...

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 ...

Typically, telescopes are synonymous with bringing far-off objects close, but the newest member of the solar system was ...

Theories about Planet Nine have been swirling for years, but this newly discovery planet might put those theories to bed for good.