PLUTO

Pluto Ninety three years ago an astrologer noticed slight variations in the orbit of the planet Uranus.Then the search began for a ninth planet.Twenty five years later a startling discovery was made. The year was nineteen thirty when Clyde William Tombaugh had discovered a ninth planet beyond Neptune.The telescopic search initiated twenty five years years before by the man who first noticed these variations in Uranus's orbit Percival Lowell had been a success.4670000000 miles (2670000000 kilometers) from Earth (at its closest point) a small yellowish colored marble was spotted.3666200000 miles (3666200000 kilometers) from the sun the small planet had a diameter of one thousand four hundred twenty miles (2284 kilometers) making it the smallest planet, and yet the furthest from the sun.Its mass only point four percent of Earth's, and radius only eighteen percent of Earth's it is quite a small planet.It has a density of one hundred ninety nine percent almost twice water. Plutos environment is one of a cold desolate place.The tempeture ranges from a frigid negative two hundred twenty three to negative two hundred thirty three degrees Celsius which converts to negative three hundred sixty nine and negative three hundred eighty nine degrees farenhiet.Its extremely frigid tempetures are due to its obvious distance from the sun.Its atmosphere consists of nothing more than methane.Plutos thin atmosphere also contributes greatly to its extremely low atmospheric pressure only one hundred times weaker than that of Earth's. Its surface is made of very rocky material which is believed to be caused by the low tempeture, and atmospheric pressure. Pluto has only one natural satellite named Charon.Not so much as satellite a duplicate of Pluto its diameter is one thousand nine hundred ninety two kilometers (720 miles).