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Pluto was once our ninth planet, but is now a dwarf planet. Learn about its discovery, exploration, features, and more from NASA's official website.
- Pluto: Facts - NASA Science
Magnetosphere. Introduction. Pluto is a complex and...
- All About Pluto | NASA Space Place – NASA Science for Kids
Pluto is a dwarf planet that lies in the Kuiper [KI-per]...
- In Depth | Pluto – NASA Solar System Exploration
In Depth. Pluto is a complex and mysterious world with...
- Pluto: Facts - NASA Science
Jul 13, 2015 · By Paul Rincon. Science editor, BBC News website. Nasa's New Horizons mission made a close pass of Pluto this week. For more than 70 years, Pluto was one of nine planets recognised in our...
Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most-massive known object to directly orbit the Sun. It is the largest known trans-Neptunian object by volume, by a small margin, but is less massive than Eris.
Learn how the International Astronomical Union defined the term planet in 2006 and why Pluto was demoted to a dwarf planet. Find out the scientific reasoning and the public reaction to the change in the solar system.
