Mercury is one of the smallest of the nine planets in our solar system.
It is also the nearest planet to the sun.
Because Mercury rotates exactly three times every two orbits around the Sun, and because Mercury's orbit is elliptical, a visitor to Mercury might see the Sun rise, stop in the sky, go back toward the rising horizon, stop again, and then set quickly over the other horizon
The temperature on this planet ranges from –315°F to 648°F:
Mercury spins very slowly. The side next to the sun gets very hot before it turns away from the sun. The other side freezes while away from the sun.
As the planet slowly spins, the frozen side then becomes burning hot and the hot side becomes freezing cold.


Even though Mercury spins slowly, it moves around the sun very quikly. That is why it was named Mercury - after the Roman messenger for the Gods.