| Pluto is the only planet that we have not sent a space craft to yet, although there is one planned to go there. It is a mysterious place. Some don't even consider it to be a planet but rather a large Kuiper Belt object. Me? I think it's a planet. |
| The Nine Planets: Pluto | Pluto Planet Profile | |
| Pluto Home Page | New Horizons: NASA's Pluto-Kuiper Belt Mission | |
| HST Images of the Surface of Pluto | Planetary Society: Pluto: Ninth Planet From the Sun | |