Jupiter

Jupiter is the fifth and largest planet in our solar system. This planet is made mostly of 93% hydrogen and 7% helium gases. Jupiter is so large that all the other planets in our Solar System could fit inside. The gravity on Jupiter is 254% of the gravity on Earth. Jupiter has at least 63 moons. The four largest moons, known as the "Galilean moons", are Io, Europa, Ganymede and Callisto. Jupiter was first visited by NASA's Pioneer 10 in 1973.

orbit: 778,330,000 km (5.20 AU) from Sun
diameter: 142,984 km (equatorial)
mass: 1.900e27 kg