Revolution of a planet can mean two things:
* orbital period - the time it takes to orbit the Sun - then the answer is Neptune, the farthest planet. Neptune takes about 165 years to orbit the sun once. It is thus the planet in our solar system with the longest period of revolution. The dwarf planet Sedna may take as long as 12,000 years to orbit the sun.
* rotational period - the time it takes to spin on the axis - then the answer is Venus. Venus has the longest period of rotation (day) at 243 Earth days.
Eris, which is larger than Pluto, orbits once every 557 years.
Any of the gas giants (Jupiter, Saturn, Uranus, Neptune) would fit that category
The outer planets have the longer revolution period, which are Jupiter, Saturn, Uranus and Neptun.
Sort of, but "large orbit" here refers, strictly speaking, to only the semi-major axis. The minor axis can be arbitrarily small as long as it doesn't actually run into the Sun.
The farther an object is from the sun, the longer it takes to orbit the sun, so Nuptune's period of revolution is longest among the planets (164.79 Earth years).
Neptune or Uranus
Hi Venus is the only planet that has the revolution period closest to that of the Earth. Venus with a revolution time of 224.7 Earth days. Venus is the brightest of all the planets in the solar system and is known as the Earth's twin sister due to the similarity between the two planets in terms of Size, mass etc.
Pluto has the longest year, if it was still a planet that is, equal to 248.76 Earth years. Since Pluto is no longer considered a planet, the planet with the longest year is Neptune, at 164.8 Earth years per revolution around the Sun.
As long as the system is periodic, velocity will have no effect on the period.
If you are talking about bodies in the solar system, then revolution almost always refers to the orbiting motion of a body around another body. This is the motion that gives us the year on earth. The earth revolves around the sun once in about 365.25 days. Revolution can be a little more complex than this. A sidereal revolution is the orbit of a body as it is observed from the distant stars. Synodic revolution is a revolution as it is observed from the body being orbited, and it brings the orbiting body back to its starting point relative to the sun. These two orbital periods are not the same length. The phases of the moon follow the synodic period; the synodic period is longer than the sidereal period by roughly a day or two.
which planet takes the longest time to revolve around the sun
Neptune, at about 165 Earth years.
If you still consider Pluto to be a planet, then the answer is Pluto, which completes one revolution around the sun in 248 years. If you agree with the downgrading of Pluto to something less than a full-fledged planet, then the answer is Neptune. The general rule is: The farther a planet is from the sun on the average, the longer it takes to complete its orbital revolution.
In our solar system Neptune is the planet with the longest period or year - equal to about 165 Earth years.
Jupiter takes 11.86 Earth years to orbit the Sun - this is the 4th longest orbital period.
There are no planets in our solar system with a rotational period of 318 days. The longest is Venus, with a rotational period of 243 days.
Hi Venus is the only planet that has the revolution period closest to that of the Earth. Venus with a revolution time of 224.7 Earth days. Venus is the brightest of all the planets in the solar system and is known as the Earth's twin sister due to the similarity between the two planets in terms of Size, mass etc.
All planets in our solar system vary in the time it takes them to complete a revolution. This is due to their differing distances from the sun. As far as rotation goes, the time varies from nine hours and fifty minutes for Jupiter to 244 days for Venus to make a like rotation.
A "year" on earth turned out to be the period of the earth's orbital revolution around the sun, although the word was invented long before any knowledge of the structure of the solar system or the earth's place in it. By analogy, the same word is typically used to refer to the period of orbital revolution of any other planet.
Neptune.
Pluto has the longest year, if it was still a planet that is, equal to 248.76 Earth years. Since Pluto is no longer considered a planet, the planet with the longest year is Neptune, at 164.8 Earth years per revolution around the Sun.
The Revolution of Eris is about 8 hours per day. FYI, I mean "day" as in one complete revolution. As in "day" and "night" on Eris.
As long as the system is periodic, velocity will have no effect on the period.