Mercury

Mercury is the closest planet to the Sun only 58 million km (36 million miles).
Temperature on Mercury varies more than any other planet.
Mercury is named for the Roman messenger to the gods.
Its orbital speed is 172,294 km (107,082 mile) per hour.
Mercury has a diameter of 4,879 km (3032 miles) making it the smallest planet.
A year on Mercury takes 88 Earth days.
A day on the surface of Mercury lasts 59 Earth days.
Your weight on Mercury would be 38% of your weight on Earth.
Temperature range 450 degrees to minus 170.
The surface of Mercury is very similar to our moon. It has a very barren, rocky surface covered with many craters.