Jupiter is out of the Solar System.
Jupiter is the fifth planet from the Sun and the largest in the Solar System . Solar System . The vast majority of the system 's mass is in the Sun , with the majority of the remaining mass contained in Jupiter . The two largest , Jupiter and Saturn , are gas giants , being composed mainly of hydrogen and helium ; the two outermost planets , Uranus and Neptune , are ice giants , being composed mostly of substances with relatively high melting points compared with hydrogen and helium , called volatiles , such as water , ammonia and methane . The asteroid belt , which lies between the orbits of Mars and Jupiter , mostly contains objects composed , like the terrestrial planets , of rock and metal .