It is a gas giant with mass slightly less than one thousandth that of the Sun and two and a half times more massive than all of the other planets in our Solar System combined.

Jupiter is primarily composed of hydrogen with a quarter of its mass being helium.

There are also at least 63 moons, including the four large moons called the Galilean moons that were first discovered by Galileo Galilei in 1610.from wikipedia.

haha..thats all. short and nice. perfect!!