Solar System
Jupiter
Gas Giant · Largest Planet

Jupiter is a gas giant with no solid surface and more mass than all other planets combined. Its powerful magnetic field — 20,000× stronger than Earth's — traps energetic particles in intense radiation belts.

Planet Data ○ Reference
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Mean Radius
69,911 km
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Gravity
24.79 m/s²
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Density
1.33 g/cm³
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Avg Temperature
-108 °C
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Axial Tilt
3.1°
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Escape Velocity
59.50 km/s
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Orbital Period
4,332.6 days
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Rotation Period
9.93 h
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Known Moons
95
Overview via Wikipedia
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Atmosphere Composition
Hydrogen 89%
Helium 10%
Methane 0.3%
Ammonia 0.026%
Other 0.67%
Notable Features
Great Red Spot — storm larger than Earth, raging 350+ years
Ganymede — largest moon in the Solar System
Europa — subsurface ocean, candidate for extraterrestrial life
Io — most volcanically active body in the Solar System
Space Missions
Mission Year Notes
Pioneer 10 & 11 1973–74 First spacecraft to fly past Jupiter
Voyager 1 & 2 1979 Detailed images; discovered ring system
Galileo 1989–2003 First Jupiter orbiter; released atmospheric probe
Juno 2016–present Studying Jupiter's interior and auroras
Moons & Satellites
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NASA Images

Images courtesy of NASA Image & Video Library. All images are public domain.

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Jupiter Science Quiz

10 questions from our Science quiz

Question 1 of 10
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Solar System