Jupiter Has More Than 90 Known Moons
The four largest are Io, Europa, Ganymede and Callisto.
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The Juno Spacecraft Has Orbited Jupiter Since 2016
It arrived in July 2016 and has studied the planet's atmosphere, gravity and magnetic field.
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A Day on Jupiter Lasts Less Than 10 Hours
Despite its size, Jupiter spins faster than any other planet in the solar system.
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Galileo Discovered Four of Jupiter's Moons in 1610
The moons are still called the Galilean moons, and they offered early evidence against an Earth-centered universe.
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Jupiter Is More Than Twice as Massive as All Other Planets Combined
The gas giant holds about two and a half times the mass of all the other planets put together.