Everyone's favorite dwarf planet, Pluto, was discovered just 95 years ago. Here's the story of how the once-ninth planet was ...

"Major" planets, such as Earth, clear their paths in orbit around the sun ... Credit: Mashable Scientists have studied other dwarf planets like Eris, Makemake and 2007 OR10 from Earth to try ...

Although Pluto's orbit was more elongated than the other planets ... such as Pluto and Eris—the International Astronomical Union in 2006 recommended that they be called "dwarf planets ...

Each ring represents an object's orbit, and the mess ... and the randomness of the dwarf planets is quite apparent." Brown is the person who discovered Eris, a 10th solar system object that's ...