ELI5 Jupiter - can you land on a gas planet?

ELI5 Explain Like I'm 5: Bite sized answers to stuff you should know about - in a mini podcast

What do they mean when they say Jupiter is a "gas" planet? Could a rocket be shot through it? Can a space ship land on it? If Jupiter’s Great Red Spot is a storm, why has it been there for so long? Why was the Juno mission one of NASA’s most difficult?

... we explain like I'm five

Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: simonowens, billandteds69 and spriddler

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