Neptune was first identified as a planet in 1846 by the German astronomer Johann Gottfried Galle. Neptune is the fourth of the gas giants. It is slightly smaller than Uranus.
Neptune Statistics
Length of Day: 16 hrs
Length of year: 165 years!
Blue Appearance: Neptune gets it's bluish appearance from the methane gas in it's atmophere, which has a blue color.
Distance from Sun: 4,500 million km
(2,800 million miles)
