Jupiter

Type: Gas giant planet
Mass: 1.9 × 10^27 kg
Position in the Solar System: 5
Distance from the Sun: 800 million km

It is the largest planet in the Solar System, with a radius more than ten times that of Earth.
Jupiter is orbited by 92 known moons, including the four famous Galilean satellites: Io, Europa, Ganymede, and Callisto.

Fun fact: By observing Jupiter's four main moons, Galileo proved that not everything revolves around Earth, which got him into serious trouble with the Church... This seemingly innocuous discovery radically changed our view of the universe.