Mercury

Mercury is the 1st planet in our Solar System. It has no atmosphere and is pitted with craters like our moon. Temperatures can reach as high as 801F (427C). Some craters are so deep that light has never reached the bottom and with no atmosphere to trap the heat it can get as cold as -279F. Mercury is also the smallest planet in our solar system (Pluto isn't a planet anymore, remember?). Mercury has no moons and is a dead lifeless planet.