What is a dwarf planet? In 60 seconds, you'll know. This is "Space Shorts."
Dwarf planets are a lot like regular planets:
The big difference?
There may be dozens of dwarf planets in our solar system. So far, we've classified just a handful -- most of them are very far away.
Pluto is the most famous, but closer to home is another mysterious world. Ceres: the first dwarf planet to be visited by a spacecraft.
With everything we learn from the Dawn mission, our understanding of planets and dwarf planets will rocket far beyond all that's been known before.