What kind of planet is Jupiter?
AnswerA gas giant
Jupiter has no solid surface like Earth; it is a huge ball of gas and liquid.
Science · Facts & stats
Jupiter facts & stats
7 fact-checked facts about the planet Jupiter, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What is Jupiter's Great Red Spot?
AnswerA giant storm
The Great Red Spot is a huge, long-lived anticyclone that astronomers have watched for well over 150 years.
Going deeper
Which of Jupiter's moons is the largest moon in the solar system?
AnswerGanymede
Ganymede is bigger than the planet Mercury, though less massive.
Which of Jupiter's moons is the most volcanically active body in the solar system?
AnswerIo
Tidal heating from Jupiter's gravity powers hundreds of active volcanoes on Io.
About how long is one rotation, or day, on Jupiter?
AnswerAbout 10 hours
Jupiter spins in just under 10 hours, the shortest day of any planet.
Expert level
Jupiter's mass is about how many times the mass of Earth?
AnswerAbout 318
Jupiter is about 318 Earth masses, more than twice all the other planets combined.
Which spacecraft discovered Jupiter's faint ring system in 1979?
AnswerVoyager 1
Voyager 1 imaged Jupiter's thin, dusty rings during its 1979 flyby.
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