Jovian planets is a huge planet made of gas. We call it the outer planets. Gas planets have very deep centers and are usually made of metalic or rock. This gas planet has a mass which is mostly hydrogen, helium, water, methane, ammonia, and many more. These gas planets have a very large size, with this very large size they have so much gravity that they can make you weigh 5 times heavier or even bigger. Gas planets have many moons, some have tens of moons to hundreds of moons. Gas planets are very cold because they are so far from the sun, their temperatures can reach more than – 200 degrees celcius. All the gases planets have a ring around it, some are visible and some are not.