If you love the ocean, then I know just the planet you should visit! You should go to Jupiter. Jupiter is one big, swirling sea. But, I should probably warn you that this sea isn't the kind you can swim in. It is an ocean made up of hydrogen and helium gases. I should probably also tell you that you won't be able to build any sandcastles there. Jupiter doesn't have any sand. The whole planet's surface is just liquid and gas. Scientists believe there is a solid core. You might also want to know that Jupiter has some wild weather. It's been .....