Neptune. It was discovered in 1846, and will not complete its first orbit around the Sun since then until next year, giving it an orbit duration of roughly 165 years.
Neptune takes the longest as it is the farthest away.
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.
To find the number of revolution days of a planet, you can use the formula: revolution days = orbital period / rotation period. The orbital period is how long it takes for the planet to complete one orbit around the sun, while the rotation period is how long it takes for the planet to rotate on its axis. This formula will give you the number of days it takes for the planet to complete one full rotation around its axis.
Rotation is the spinning of a planet around its axis, causing day and night to occur as different parts of the planet are exposed to sunlight. One complete rotation results in one full day cycle.
No, the rotation of a planet on it's axis, or it's spin is not really related to the time it takes to orbit or revolve around the sun. For example, Mercury and Venus are the closest planets to the sun, yet they take a long time to rotate on their axis.
Pluto has the longest REVOLUTION period Venus has the longest ROTATION period
Venus
venus
Venus
The velocity of a planet around the sun is inversely related to the distance from the sun. So the slowest planets are the ones farthest out. If you consider Pluto a planet, it takes the longest time to revolve around the sun. If you do not consider Pluto a planet, then Neptune would be the farthest planet from the sun and takes the longest time to revolve around the sun.
If you count Pluto as a planet its Pluto :D
Period of rotation
Neptune takes the longest as it is the farthest away.
Venus
On this planet, a day is longer than a year because the planet has a very slow rotation on its axis. This means it takes longer for the planet to complete one full rotation (a day) than it does to complete one orbit around its star (a year).
A complete turn of a planet on its axis is known as a "day." This rotation determines the length of a day on that planet. For Earth, it takes approximately 24 hours to complete one full rotation.
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.