The Solar System

Jupiter

The biggest planet, a giant ball of gas. The Great Red Spot is a storm wider than Earth that has raged for centuries.

Jupiter
The largest planet, with its cloud belts and the Great Red Spot, photographed by Hubble. Credit: NASA, ESA, A. Simon (GSFC), M. H. Wong (UC Berkeley) and the OPAL team, CC BY 4.0.
Size
142,984 km across. About 11 times as wide as Earth.
One year
11.9 Earth years
One day
9 h 56 min
Moons
More than 90, including the four you can see in binoculars
Spacecraft
Juno has orbited it since 2016. Europa Clipper (arriving 2030) and Europe’s JUICE (2031) are on their way.

Sizes and periods from NASA’s planetary fact sheets; moon counts from NASA Science.