Jupiter

Jupiter is the Solar System’s largest planet, a gas giant dominated by hydrogen and helium. Its deep atmosphere, powerful magnetic field, faint rings, and extensive moon system make it a complex planetary system.

Great Red Spot: A persistent anticyclonic storm in Jupiter’s atmosphere, observed for centuries. This long-lived storm is the planet’s most recognizable atmospheric feature.
Io: The innermost large Galilean moon of Jupiter, marked by intense volcanism driven by tidal heating. Io’s volcanic activity is powered by gravitational interactions within Jupiter’s moon system.
Core accretion: A planet-formation model in which a solid core grows and then captures surrounding gas. It is a leading explanation for how Jupiter acquired its massive gaseous envelope.
Saturn: The Solar System’s second-largest planet, a gas giant distinguished by its prominent ring system. Saturn is Jupiter’s closest planetary analogue but has a lower mass and more conspicuous rings.
Pioneer 10: The first spacecraft to fly past Jupiter, doing so in December 1973. Its encounter supplied the first close-up measurements of Jupiter and its radiation environment.
Jupiter's magnetosphere: The region around Jupiter controlled by its magnetic field and filled with trapped charged particles. Jupiter’s rapid rotation and strong field create the Solar System’s largest planetary magnetosphere.
Europa: An icy moon of Jupiter with a fractured surface and strong evidence for a subsurface ocean. Europa’s ocean makes Jupiter’s system a leading setting for investigating extraterrestrial habitability.
Grand Tack hypothesis: A model in which Jupiter migrated inward and then outward through the early Solar System. It proposes a migration history that could explain the small mass of Mars and inner asteroid belt structure.
Uranus: An ice giant whose atmosphere contains hydrogen, helium, and methane and whose rotation axis is sharply tilted. Uranus contrasts with Jupiter in composition, size, and axial orientation.
Voyager 1: A NASA spacecraft that flew past Jupiter in 1979 and continued toward interstellar space. Its images revealed active volcanism on Io and detailed the giant planet’s atmosphere.

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