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Listed under:  Science  >  Earth and space  >  Universe  >  Planets  >  Dwarf planets  >  Pluto
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Sites2See: Astronomy for primary

A small galaxy of sites and resources, from Galileo making discoveries that changed our view of the universe, to new images and understandings from Hubble, on a page tailored for Primary students.

Video

Triple J: Why is Pluto not a planet?

Watch this clip and learn why Pluto was taken off the official list of planets. Dr Karl Kruszelnicki explains the three criteria that must be met before planets can be called planets. What are they?