Question

How is Jupiter so big ?

Answer 1

Jupiter is so big because jupiter formed at a right place in a solar system where it captures more dust and gas. -- closer to the sun and the gases were moving too fast to be captured by the forming planets and farther from the sun there was less material to form the outer planets. Jupiter's centre core is 1. 5 times bigger than the earth which is big enough to have a gravity strong enough to keep hydrogen in its atmosphere. The first layer of Jupiter's structure is molecular hydrogen .