Jupiter is the largest planet, a gas giant more massive than all others combined. It has a thick atmosphere primarily of hydrogen and helium, dozens of moons, and faint rings. The Great Red Spot, a giant storm, has raged for centuries.

Its powerful magnetic field and radiation belts are immense. Moons like Europa may harbor subsurface oceans. Jupiter’s gravity influences asteroids and comets, playing a major role in shaping the solar system