The time of revolving depends on the distance so that the more distant planets take longer to get round, and as well as that they move more slowly, which makes them take even longer.
The record is held by the dwarf planet Sedna, which takes 11,400 years for one revolution of its highly elliptical orbit.
He discovered that the planets revolved around the sun instead of the planets & the sun revolving around Earth.
Some planets take longer to orbit the sun because they are farther away giving them a longer path to travel.
There are more than 300 known stars with known planets, and the list gets longer all the time.
The Moon takes longer. The Earth spins once in 23 hours 56 minutes, while the Moon spins once in about 27 days.
The outer planets all rotate faster than the inner planets. Each of them has a rotational period shorter than an Earth day. All of the inner planets have rotational periods longer than one Earth day. The outer planets are mostly made up of hydrogen, helim, and ice, and they are much larger than the inner planets which are mostly iron and various types of rock.
Earth itself is rotating on a axis and it's revolving around the sun at the same time.
We do not know as nobody was arround at the time to herd them and record how to do it.
Neptune is the only planet that takes longer than Uranus to orbit the Sun.
If sun's gravity suddenly disappears then the planets will stop to revolve around the sun after some time and this duration is equal to the time taken by the light to reach from sun to other planets. For e.g. Time taken by earth to stop revolving and flying off in any direction = Time taken by light to earth from sun = 8 min. 20 seconds Also, planets will start to fly in any direction and they may collapse and in simple words: Solar system will collapse and life will disappear on earth.
Planets do not collide while revolving around the sun because they have stable orbits and follow gravitational laws. The gravitational force between the planets and the sun keeps them in their respective orbits. The speed and direction of their orbits ensure that they maintain a safe distance from each other, preventing collisions.
Scientists don't know that yet, but there's no rule that says smaller mass must have shorter orbit. Look at the planets: the biggest is Jupiter and the outer planets have longer orbits.
The outer planets take much more time and also travel longer to complete a whole orbit around the Sun, than the inner ones.