Astronomers have discovered a new member of a rare and mysterious class of solar system objects known as sednoids - a subset of extreme trans-Neptunian objects (ETNOs) with exceptionally distant, ...

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

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

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

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

Researchers just got a step closer to understanding the origins of our solar system, with the discovery of an object orbiting ...

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

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 ...

The “new world” was found as part of the survey project FOSSIL (Formation of the Outer Solar System: An Icy Legacy), hence its nickname, Ammonite. An ammonite is a fossil of a cephalopod that died out ...

Astronomers discovered the first Sednoid, named Sedna, in 2003. This animation shows the motion of Ammonite over several hours. Credit: NAOJ/ASIAA.

The orbit of a newly discovered sednoid, 2023 KQ 14, in red, along with the orbits of the three previously known sednoids in white. Credit: NAOJ.

After discovering the first sednoid, Sedna, researchers believed they would find more quickly, but that didn’t happen — V113 and Sedna are the only two that have been discovered so far.