And don't forget the plutoids, — dwarf planets beyond the orbit of Pluto — and the trans-Neptunian objects, which include the plutoids and other small solar system bodies that orbit beyond ...

Things have been a mess since Pluto's demotion. In 2006, the International Astronomical Union (IAU) voted on the definition of a planet. Famously, Pluto no longer met the criteria and was demoted ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. In 2006, the International Astronomical Union (IAU) voted on the definition of a planet. Famously ...