Jupiter is so large it is better thought of as a failed star than an oversized planet, and its gravity has shaped the entire solar system. But the real interest now is its moons, particularly Europa, which almost certainly hides a saltwater ocean holding twice the water of Earth's, beneath a shell of ice.

You'll come away understanding what the Great Red Spot actually is, how tidal heating keeps distant moons warm, and why Europa has become one of the best places to look for life.

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Further reading: NASA Juno and Europa Clipper mission pages; ESA JUICE mission; Galileo mission science summaries.