A newly discovered dwarf planet called 'Ammonite' (2023 KQ14) has been spotted in the outer solar system, and it could be ...

We still don't know for sure if there's a ninth planet in our solar system, but a new discovery could help to prove that ...

A tiny object far beyond Pluto, newly discovered by the Subaru Telescope, could reshape our understanding of the early Solar System. Named 2023 KQ14, this rare “sednoid” follows an unusual orbit that ...

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

Researchers use the Subaru Telescope in Hawaii to find a small object on the outer edge of the Solar System. Nicknamed ...

"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today ...

Astronomers have hoped for the existence of Planet Nine for years. Things were looking promising, but this discovery might ...

Planet Nine should appear stationary over the course of a single day but show detectable movement over months.

The discovery was made by astronomers using the Subaru Telescope, which is situated atop a dormant volcano in Hawaii.

Planet 9 is a hypothetical world roughly the mass of Neptune that orbits our Sun in a giant ellipse, at a distance of 40 to over 100 billion miles.

Planet Nine has as much angular momentum as the entire solar system combined, because it’s orbit is so big. AM: Have there been other theories about how this tilt may have happened before your ...