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
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).Discovered in nineteen seventy eight
this natural satellite is nineteen thousand kilometers...