165 Earth Years
60,190.03 Earth days (164.79 Earth years) (89,666 Neptune days)
it's actually 1 sec on earth
1978 earth months.
Neptune orbits the sun, not Earth. Its orbital period is 60,182 Earth days, or about 165 Earth years.
165
Neptune takes approximately 164.8 Earth years to orbit the sun.
It takes Neptune 60,190 Earth days to orbit the Sun.
60,182 earth days.
it takes Neptune164 earth years to orbit the sun and a 16 Earth hours
Neptune takes about 165 Earth years to orbit the Sun. That's one Neptune "year" of course. Neptune's "day" is about 16 hours and 6 minutes ( 16.1 hours). That's the time it takes to spin on its axis once. From that you can work out how many Neptune days the orbit takes, if you want. I make it to be about 89838 "Neptune days". You can say Neptune "year" and Neptune "day", but the terms "week" and "month" are normally only used for planet Earth. Also when I've used "hour" in this answer I mean an Earth hour. This is normal in books on astronomy.
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.
Eight planets orbit the Sun: Mercury Venus Earth Mars Jupiter Saturn Neptune Uranus