164 years almost 165 more than the sun
It takes roughly 165 Earth years for Neptune to complete a rotation around the Sun.
Earth and Neptune formed together so it has lived the same number of Earth Years as Earth has.
60225 earth days = one year on Neptune
it takes 165 Earth years for Neptune to revolve around the sun.
Now that Pluto has been downgraded to a dwarf planet, Neptune is the most distant planet from the Sun. It takes 164.79 Earth years for Neptune to circle the Sun, so one Earth year would be about 1/165 of a Neptune year (the time it takes Neptune to circle the Sun).
It takes 164.8 years to complete one revolution to neptune around the sun
Approx 1980 years.
20 years
It takes Neptune about 165 years to make one orbit around the sun.
Neptune has completed MANY orbits around the Sun since its formation. However, an interesting note is that since its "discovery" in September of 1846, it has not yet completed one orbit, which takes 164.8 Earth years. This will occur in June, 2011.
Approximately 164-165 earth years
Neptune are 164.79 years compared to earth