Mercury

Mercury is one of the smallest planets in the solar system and it is the closest to the sun. The surface of Mercury is like the surface of the moon which has large holes all over it. The side of Mercury that is facing the sun is twice as hot as a kitchen oven which means that it is 800'F (427'C). The darker side is 3 times colder than Antarctica in winter which also means minus 297'F (183'C). It takes 87.66 days for Mercury to go around the sun once.
Mercury Planet  WP:CC BY-SA