Mercury
The smallest planet in our solar system, with a diameter of 4,879 km.
It orbits the Sun with an eliptical orbit ranging from radius 46-69.8 million metres.
Mercury is a rocky planet and is a very similar size to Earth's moon.
She is the 2nd hottest planet in the Solar System.
One year on Mercury is only 88 Earth days, and one Mercury day is equivalent to 59 Earth days.