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: http://www.space.vsi.ru/neptune.htm
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Neptune is the coldness kingdom.
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Neptune is the eighth from the Sun great planet. It looks like a star of 7,8 star value (it can not be seen by naked eye).
The composition and structure.From all the elements in Neptune the main are hydrogen and helium in such ratio(approximately) as in the Sun in one helium atom falls 20 atoms of hydrogen. In the Neptune like in the other planets then had been the multi-layered differentiation of the substance, and as a result a long icy shell was generated. According to the theoretical data there is a cloak and a core in Neptune. The core mass may by 90% of the entire planet’s mass. The effective temperature is 38K but to the centre it increases up to (12-14)* 10^3K.
6 satellites move near Neptune. The biggest is Triton. Its radius is 1600km.The second satellite is Nereida (radius is 100km).
Neptune