Structure

The atmosphere consists of hydrogen, helium, methane, ammonia and traces of other materials. At the boundary of the atmosphere there is a temperature of -140°C prevails to the atmosphere. The temperature and the pressure however increased fast towards the center. The internal structure deffers - exactly as with Saturn, Uranus and Neptun - completely from the inner planets Mercury, Venus, Earth and Mars as well as Pluto. That can be already seen with the average density: The average density of Jupiter is about 1.3 g/cm^3. That is somewhat more than water and completely different to the one of the earth, which is approximately 5.5 g/cm3. Compared to his size, Jupiter has a small nucleus, which consists of solid material. Otherwise the hydrogen - atmosphere inward becomes liquid hydrogen if it is near the nucleus.

The Jupitermoon Europa