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

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

Every once in a while, space gives us something totally unexpected. Well this time, the solar system is surprising us with a ...

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

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

In 2003, NASA-funded researchers spotted what was then the most distant object discovered in our Solar System. The dwarf ...

Astronomers have discovered a "fossil" world lying in the outskirts of the solar system, according to new research.

Learn more about a sednoid called Ammonite that has been detected in the outer reaches of the Solar System.

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 ...

The Subaru Telescope has revealed a fourth member of the sednoids, a group of small bodies with peculiar orbits around the ...

Despite the powerful telescopes that modern astronomers have to work with, the distant reaches of the Solar System are still ...

Astronomers have discovered a new world circling the outer edges of our solar system. So far, there are only four known ...