# Why is Jupiter gaseous rather than solid or liquid?

Why is Jupiter made up of gas? If the gravitational pull was strong enough would it compress to form a solid body?

Once equilibrium is established it's just a matter of seeing whether the temperature and pressure are such that material will exist in a solid, liquid or gas phase. Near the surface of Jupiter (temperature $\approx 200\,{\rm K}$; $\log_{10}(T/{\rm K})\approx 2.3$), the pressure is much too low for hydrogen gas:
There is no exact surface, but depths one can see to have pressures on the order of hundreds of ${\rm kPa}$ ($\log_{10}(P/{\rm Pa})\approx 5$; the pressure would need to be about $100\,000\times$ higher for solid hydrogen to form at this temperature. The core of Jupiter is thought to be hot and dense enough that it may be a metallic liquid or perhaps solid, but as far as I know this has not been conclusively measured.