Jupiter

The fifth (5th) planet from the sun, Jupiter is huge and is the most massive planet in our solar system. It’s a mostly gaseous world, mostly hydrogen and helium. Its swirling clouds are colorful due to different types of trace gases. A big feature is the Great Red Spot, a giant storm which has raged for hundreds of years. Jupiter has a strong magnetic field, and with dozens of moons, it looks a bit like a miniature solar system.

    Discovery: Known to the ancients and visible to the naked eye

    Named for: Ruler of the Roman gods

    Diameter: 88,730 miles (428,400 km)

    Orbit: 11.9 Earth years

    Day: 9.8 Earth hours