The solar system lost its ninth planet back when Pluto was demoted to a dwarf planet, but research might indicate that there ...

The status of Pluto not withstanding, our solar system has 8 planets, but one astronomer believes we used to have a ninth ...

The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper’s authors have dubbed ...

The solar system could be destroyed much sooner than we thought, scientists say - Outer planets could be thrown out into the ...

For more than three centuries, astronomers asking whether the Solar System is stable have received ever more comforting ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. Digital art of distant planet - Dottedhippo/Getty Images On August 24, 2006, our solar system lost a planet. It wasn't by ...