Question

which planet composed entirely of hydrogen and helium?
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Answer 1

Answer:

The composition of Jupiter is similar to that of the Sun—mostly hydrogen and helium. Deep in the atmosphere, pressure and temperature increase, compressing the hydrogen gas into a liquid. This gives Jupiter the largest ocean in the solar system—an ocean made of hydrogen instead of water.

Explanation:

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Answer 2

⭐⭐⭐Composed predominantly of hydrogen and helium, the massive Jupiter is much like a tiny star. But despite the fact that it is the largest planet in the solar system, the gas giant just doesn't have the mass needed to push it into stellar status. When scientists call Jupiter a gas giant, they aren't exaggerating.⭐⭐⭐