From its discovery in 1930 until 2006, Pluto was classified as a planet. Now it is classified as a dwarf planet.
Pluto fun facts
Pluto is named after the Roman god of the underworld, Pluto
cool Pluto facts
Pluto has five known moons, the largest being Charon
Pluto facts for kids
The orbital period of Pluto is 248 Earth years. The orbit of Pluto is elliptical.
Pluto fun facts
Pluto has not cleared out its orbit. Although Pluto orbits the Sun and it’s round, it’s not a planet. And that’s because Pluto has not cleared out its orbit of material. This was the reason that the International Astronomical Union chose to demote it from planet to dwarf planet in 2006.
Pluto has an atmosphere. As Pluto moves away from the Sun, this atmosphere gets so cold that it freezes onto the surface. And then as the dwarf planet warms again, the atmosphere evaporates again, forming a gas around it.
cool Pluto fun facts
If it were closer to the Sun, Pluto would be a comet. Pluto wouldn’t last long if it got much closer to the Sun. It’s comprised of about half rock and half ice. This is a similar ratio to many rocky comets in the Solar System
interesting Pluto facts
Pluto is the one of two planets in our solar system that rotates clockwise (east to west) So, Sun rises in the west and sets in the east on Pluto
Pluto fly-by: July 14, 2015
The fastest spacecraft ever launched, New Horizons has traveled a longer time and farther away – more than nine years and three billion miles – than any space mission in history to reach its primary target. Its flyby of Pluto and its system of at least five moons on July 14, 2015 will complete the initial reconnaissance of the classical solar system. NASA’s New Horizons spacecraft will soon give us the first-ever close up images and scientific observations of distant Pluto and its system of large and small moons.