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made out of
The outermost layer of Neptune is the atmosphere, forming about 5-10% of the planet’s mass, and extending up to 20% of the way down to its core. Neptune’s atmosphere is about 80% hydrogen, 19% Read more: http://www.universetoday.com/21596/what-is-neptune-made-of/#ixzz2ceiA0mM8 -
made out of
At the very center of Neptune is the planet’s core. The core of Neptune is made of iron, nickel and other silicates that make up about 1.2 times the mass of the Earth. -
neptune
Neptune was subsequently observed on 23 September 1846[1] by Johann Galle within a degree of the position predicted by Urbain Le Verrier -
discovery
The planet Neptune was mathematically predicted before it was directly observed. With a prediction by Urbain Le Verrier, telescopic observations confirming the existence of a major planet were made on the night of September 23–24, 1846. -
made out of
Beneath the atmosphere is the planet’s large mantle. This is a superheated liquid region where temperatures can reach 2,000 K to 5,000 K. It contains about 10 to 15 times the mass of the Earth, and probably consists of water, ammonia, methane, and other compounds -
the atmosphere of neptune
The atmosphere of Neptune is similar to all the large planets in the Solar System; it mostly consists of hydrogen and helium, with trace amounts of methane, water, ammonia and other ices