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What is a Light Year?
Neptune Statistics.
info stats facts observing moons probes images

Neptune Statistics
Length of Year: 164 Earth Years
Length of Day 17.24 hrs
 0.67 Earth Days
Diameter 49,532 km (31,765 mi) 3.883 x Earth's
Mass 1.0247e26 kg 17.14 x Earth's
Orbit 4,504,000,000 km 30.06 AU
Mean orbital velocity 5.4 km/sec 1.607 x Earths
Average Day temperature -353 °F
Average Night temperature -353 °F
Moons 9 named and 4 numbered
Atmosphere Hydrogen, Helium, Methane
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