Since its discovery in 1930, Pluto was considered to be the 9th and outermost planet of the solar system. Since 2006, it has been classified as a dwarf planet. Its distance from the sun fluctuates from 29 to 43 astronomical units. A complete orbit takes 248 years. It’s one of the approx. 1000 known trans-neptune objects of Orian’s belt.
These objects move in almost circular or strongly elliptical orbits that are 5 billion to 150 billion KM from the sum. Pluto and its moon, Charon, orbit each other in a 6-day, 6 hour double bond rotation, meaning that they always face each other on the same side as our moon faces the earth.
The NASA probe New Horizon started toward Pluto in 2006 and will fly by Pluto and Saturn in 2050.
Pluto was named after the Roman god of the underworld (Hades in Greek). Charon carries the name of the boatman who brought the shadows of the dead over the river Styx into the realm of the dead.