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What is Jupiter made of?

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Quick Answer

Jupiter is a gas giant composed almost entirely of hydrogen and helium in various forms, with trace elements taking up only 1 percent of the planet's composition. Although it is small compared to the sun, Jupiter is over twice as heavy as all other planets in the solar system combined.

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Full Answer

Although known as a gas giant, Jupiter is mostly made up of liquid metallic hydrogen surrounding a rock and ice core. Much remains unknown about Jupiter, but the Juno mission, which launched a probe in 2011 and is expected to arrive in 2016, may shed light on many unknown aspects of the planet.

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