Neptune. It would be Pluto, but Pluto is a dwarf planet ( a planet that was a planet, but decided that it wasn't a planet)
Mercury takes the most least time to orbit the sun. It takes 88 days.
Planet Neptune takes the most time to orbit the sun, as it is the farthest away.
PLUTO
A year (or orbital period) is defined as the period it takes a planet to orbit the Sun.
Depends on which planet/sun!Neptune!!
Neptune orbits the Sun (as do most planets) with an elliptical orbit. When the orbit takes the planet closest to the Sun it is moving faster than when it is furthest from the Sun when on an elliptical orbit.
The dwarf planet that takes 252 years to orbit the sun is called Pluto. It was reclassified as a dwarf planet in 2006.
The planet you are referring to is the dwarf planet Pluto, which takes just over 248 years to orbit the Sun.
Mercury. Its the closest planet to the sun and only takes 88 days to orbit once around the sun.
The planet Mars, which is the fourth planet from the sun, takes 1.88 Earth years to make one full orbit around the sun.
The Earth takes about 365 days (1 year) to orbit the sun.
Neptune. Because it was the farthest planet from the sun. So its orbit's length is long.