Pluto
...ages about 19,640 kilometers from the planet, and is synchronous around Pluto. It is believed that Charon has no atmosphere and is probably covered by ice. It takes one Pluto day (6.4 earth days) for Charon to orbit Pluto. The orbit of Pluto is eccentric. It rotates on its axis in the opposite direction from most other planets. Pluto has an orbital inclination of 17.15 degrees. This is the largest inclination of all the planets in our solar system. There are 20 out of every 248 earth years that Pluto is closer to the sun than Neptune. The last being from January 1979 until February 1999. For these 20 years Neptune is the furthest from the sun. Pluto’s surface is believed to be made of a very rocky material caused by the frigid temperatures and atmospheric pressure. The temperature on Pluto averages a negative 228 degrees. The atmosphere consists of mainly methane. This makes Pluto an extremely cold, icy planet. Pluto was n...