Object: Mercury Revolution around Sun: 88 days Rotation: 59 days Density: 5.4x of water Mass: 0.055x of Earth Temp: 430 C on day side, -170 C on night side Mercury is the closet planet to the Sun. It has a suface much like the Moon, in that it has a rocky suface pocketed by crators. It is not the hotest planet in the solar system, even though it is the closest. It has also been recently discovered that Mercury has small ice caps, something that was not thought possible. Moons: NONE