The temperature of the planet's interior is believed to be about 30 000o C. Jupiter has 16 known moons, the four brightest, Europe Io, Ganymede and Callisto, discovered back in 1610 by Galileo, and they usually also called the Galilean satellites.

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Thetemperatureoftheplanet'sinteriorisbelievedtobeabout30000oC.Jupiterhas16knownmoons,thefourbrightest,EuropeIo,GanymedeandCallisto,discoveredbackin1610byGalileo,andtheyusuallyalsocalledtheGalileansatellites.