Mercury and Venus
You cannot have planets orbiting planets. Planets orbit suns. Only satellites orbit planets. In the case of planet Earth, the moon is the only natural satellite.
Faster than you
Jupiter, Saturn Uranus and Neptune all complete one rotation in less than a day.
Yes, Jovian planets rotate faster than terrestrial planets. For example, Jupiter completes a rotation in about 10 hours, while Earth takes roughly 24 hours. This difference is mainly due to the Jovian planets having a greater amount of mass and their composition, which affects their rotation speeds.
Yes. The inferior planets not only move faster, but also have a smaller path, to go once around the Sun. So, both of these factors contribute for the interior planets to take less time to go once around the Sun.
Mercury and Venus
You cannot have planets orbiting planets. Planets orbit suns. Only satellites orbit planets. In the case of planet Earth, the moon is the only natural satellite.
the fastest planet that orbit's the sun is mercury.
This is false. Mercury is the "fastest" planet, with Venus and Earth next. IN fact, the orbital speed of any planet is inversely related to the distance from the Sun; close-in planets orbit faster than farther-out planets.
Faster than you
Precisely because: That's the way that gravity works.
Mercury is.
The close-in ones move fast, the far-out ones move slower. It's governed by Kepler's third law.
Jupiter, Saturn Uranus and Neptune all complete one rotation in less than a day.
Mercury and Venus, because their orbits are closer to the Sun than Earth' orbit is.
There are no solar planets that orbit the Sun in less than 24 hours. The closest, Mercury, takes about 88 days to orbit the Sun.
A year for a planet is the time it takes for that planet to orbit the sun. Some planets take longer to orbit the sun because they are farther away from the sun than Earth, so those planets have a farther distance to cover to orbit the sun once than the Earth does.