This is a drawing of the transition from the atmosphere to the interior.
Click on image for full size
The Layers Inside of Jupiter
There is no surface to the giant planets, only a gradual change from the atmosphere, as shown in this drawing.
The gases which Jupiter is mostly made of change to liquid inside Jupiter, but the change is very slow. This means that the giant planets do not have real layers on the inside, as the earth-like planets do.
The liquid sections of Jupiter are the biggest parts of the planet and go down very deep (the liquid is not made of water!). The first liquid layer inside Jupiter, right under the atmosphere, is called the liquid hydrogen layer. Under the liquid hydrogen layer is a layer called the liquid metallic hydrogen layer.
At the deepest part of Jupiter is the core, which is probably the size of planet Earth.
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