Neptune with 164 years.
Including Dwarf Planets Eris 550 years!
Venus
Neptune is the furthest planet from the sun, taking the longest time to complete one orbit, 164.79 years in total.
Planet Neptune takes the most time to orbit the sun, as it is the farthest away.
Technically, since Pluto is no longer a planet, but a dwarf planet, Uranus is the planet that takes the longest to orbit the sun.
All 8 planets, including dwarf planet Pluto, orbit the Sun. As their distance from the Sun increases, the time it takes for the planet to complete one revolution around the Sun increases as well. In order from shortest orbital period to longest orbital period:MercuryVenusEarthMarsJupiterSaturnUranusNeptune
Venus
Venus takes the second longest time to orbit the sun, with an orbital period of about 225 Earth days.
Neptune is the furthest planet from the sun, taking the longest time to complete one orbit, 164.79 years in total.
Planet Neptune takes the most time to orbit the sun, as it is the farthest away.
Approxiamtely 6756313285.666678487m
Neptune is the furthest planet from the sun, taking the longest time to complete one orbit, 164.79 years in total.
Technically, since Pluto is no longer a planet, but a dwarf planet, Uranus is the planet that takes the longest to orbit the sun.
pluto
All 8 planets, including dwarf planet Pluto, orbit the Sun. As their distance from the Sun increases, the time it takes for the planet to complete one revolution around the Sun increases as well. In order from shortest orbital period to longest orbital period:MercuryVenusEarthMarsJupiterSaturnUranusNeptune
Neptune with an orbit time of 165 years.(note:even though Pluto takes 248 years to orbit the sun it is classified as a asteroid not a planet)-Mihi
IN our solar system, the planet Neptune takes the longest. Or, if you want to include Pluto, Pluto. Or, if you want to include ALL of the "dwarf planets", then Eris (a.k.a. "Xena") takes the longest.
Neptune takes the longest to revolve around the sun.