Jupiter, with an equatorial diameter of 89,329 miles, more than 11 times than that of the Earth, is the largest of our planets. Jupiter's surface area is 120 times that of the Earth and its volume is 1,318 times the Earth's volume.
well Jupiter is actually a "jovian planet" and that means it's made up of gas.. it has some rock parts but they're like flyin' around.. so the answer is "gas" :) but i've never been there i may be wrong :P and if you're so interested about this stuff i suggest google :))
My layman's mind boggles when I hear the words 'gas planet'....so if it's made up mostly of gas and you have a ship resistant to it's elements and it's heat etc, essentially can pass right through it since it's on a gas not solid state?
No Dave, It's a gas planet but with the huge mass comes huge gravity so the planet will get ever more dense as you descend. It's debatable where the surface actually starts but it wouldn't be very far down for the gas to be a liquid and an ever thickenning soup until the rocky/iron solid centre.