Jupiter is a gas giant, mostly thought to be made of hydrogen and helium in mixture. Deeper down the temperature and pressure of the hydrogen are so high we speculate the hydrogen becomes metallic! Jupiter’s core it believed to be a mixture of rock and ice, dominated by iron, magnesium, silicon and oxygen, so not too much different from the Earth.
There main body is hydrogen and helium. The bands you see are storms and weather patterns. No one really knows what’s in the middle. All we know is that it’s really dense and at high pressure and must have a lot of mass.
Jupiter is a gas giant planet, which means that it is mostly made of gas, mostly hydrogen and helium. We think that very deep inside Jupiter it might have a rocky core.
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