[ Science / Astronomy / Solar System / Planets ]

The atmosphere of Neptune is made up of 84% Hydrogen, 12% Helium, and 2% Methane 

Neptune

	Atmospheric Composition
	Density
	Diameter
	Distance from Earth
	Distance from Sun
	Eccentricity
	Escape Velocity
	Gravity
	Mass
	Reflectivity
	Revolution Period
	Rotation Period
	Rotational Velocity
	Satellites
	Syndotic Period
	Temperature
	Tilt of Axis