Mercury is the smallest planet to go around the sun.
Mercury.
Distance from the Sun. (The closer it is, the faster it moves.)
mercury
Pluto
It goes around the sun
Mercury travels around the sun faster than any other planet (88 Earth days) because it is the closest planet to the sun.
It goes faster . and it gets warmer (on average).
If any thing goes around sun then it will be named as planet instead satellite. The one which goes around planet is known to be satellite. Now in case of moon that too goes around the sun along with earth but goes in spiral path
If you mean which planet orbits the Sun the quickest it's the planet Mercury. Mercury is the closest planet to the Sun and the closer an object is to the Sun the faster it must go around to avoid falling into the Sun.
The fastest is Mercury.
Mercury completes its orbit around the Sun faster than any other planet in our solar system.