Size

Jupiter is mainly made of the substance hydrogen like stars are.If Jupiter was about 50 times heavier, it could possibly turn into a star.Jupiter is the heaviest planet in the solar system- it is more than twice as heavy as all the other planets combined. Jupiter’s mass is about 318 times the mass of earth.Jupiter is about the largest size that a planet can be. If more substance was added to Jupiter, it would not get larger. Instead, the substance would be squeezed together more tightly.