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Gravity's role is to keep the planets in orbit and balance.
Jupiter has the most gravity in the solar systym so you would be heavier.   Jupiter is the most massive planet in the solar system. The gravity on Jupiter is around 2.5 tim â¦ es that of Earth so you would weigh 2.5 times more there. Your mass would remain the same though because the amount of stuff that is in your body doesn't change, ie you would still need the same size in jeans. Jupiter is a gas giant so you wouldn't be able to stand on its surface any way.