The Planet Jupiter is the LARGEST PLANET in our Solar System. Jupiter has at least 63 moons and they include: Europa, Io, Callisto and Ganymede.
Jupiter was explored in flybys in the 1970s by NASA's Pioneer 10 and 11 and Voyager 1 and 2 spacecraft, and is currently being studied by the Galileo spacecraft
Facts about Planet Jupiter
* Diameter: 85,788 miles the largest planet - more than 12 Earths could line up across it
* Temperature: Range -163° C to >-121° C
* Distance from Sun: Approximately 466 million miles
* Atmosphere: Mostly hydrogen and helium
* Surface: A giant ball of mostly hydrogen and helium
* Rotation of its axis: 9 hours, 55 minutes in Earth time (the length of one rotation)
* Rotation around the Sun: 12 Earth years
* Magnetic Field: Yes
* Number of Moons: 63 moons have been identified Ganymede is the largest moon - it is bigger than both Mercury and Pluto
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