For decades, our solar system was thought to have nine planets, with Pluto considered the smallest and farthest. But in 2006, ...

A small team led by Sihao Cheng, Martin A. and Helen Chooljian Member in the Institute for Advanced Study's School of Natural ...

Scientists are intrigued after spotting a highly unusual celestial object lurking at the very edge of our solar system.

Scientists have discovered a mysterious new object far beyond Neptune, and it could be one of the most distant dwarf planets ...

T he Solar System has just gotten a new official member. Currently, with the name of 2017 OF 201, this is a trans-Neptunian ...