Neptune is the coldness kingdom.

Neptune Diameter 48 600 km Mass 1,03*10^26 kg Density 2300 kg/m^3 The period of rotation 16 h 03 min The average distance from the Sun 30,06 а.u. The period of revolution 164,79 years Excentricity of the orbit 0,009 The orbit’s slope 1,77°

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.