It's official -- you can now wax nostalgic with your kids about the days when there used to be nine planets. Space.com reports that Pluto has been demoted from planetary status, leaving the solar system with eight planets. The diminitive body, as well as its moon and dozens of other objects lying beyond the orbit of Neptune, will now be known as dwarf planets.

An earlier proposal to keep Pluto a planet by relegating it to a subcategory called "plutons" proved exceedingly controversial and was ditched in favor of a new definition that downsized the nineth planet.