Jupiter and its Galilean Satellites
Jupiter
Orbit: 778,330,000 km (5.20 AU) from Sun
Diameter: 142,984 km (equatorial)
Mass: 1.900e27 kg
Jupiter is the fourth brightest object in the night sky and is also the biggest planet in our solar system. In fact it's so big you can put 100 Earths around it. One of the main reasons it is so big is the volume of its gases, which are 90 percent hydrogen, and 10 percent helium and traces of methane, water, and ammonia. The sun contains 99.8 percent of the matter in our solar system and Jupiter contains 70 percent of what is left.
Jupiter has a magnetosp…
