Jupiter is the largest planet in the Solar System. Its mass is 318 times that of Earth. Its radius is 11 times that of Earth. Jupiter's density is 1.3 gm/cm3. So, it is composed mainly of gases with a rocky and (liquid) metallic core. This core generates a strong magnetic field (10 times that of Earth). The atmosphere is 79% hydrogen (H), 20% helium (He). Alternating zones and belts in atmosphere are produced by rising and sinking of hot gas (convection). Jupiter has many moons (>20), including 4 satellites first discovered by Galileo (Galilean satellites).
One moon, Io, has active volcanoes! Another moon, Europa, has oceans (icebergs!)
Belts and Zones: Manifestation of Convection
Clouds and Storms
Collision with a comet:
