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In ScienceFiction settings, characters will often travel to other planets. In real life, gravity is determined by the mass of the object in space -- the higher the mass, the higher the force of gravity. While astronauts will ''bounce'' on the moon, they would not be able to jump nearly as high on Jupiter as they can here on Earth.

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In ScienceFiction settings, characters will often travel to other planets. In real life, gravity is determined by the mass of the object in space -- the higher the mass, the higher the force of gravity. [[note]]A planet's radius, and thus density, matters too; for example, Saturn has about the same force of gravity at its surface as the Earth, even with its much larger mass, because its density is so low that the surface is very far from its center of mass.[[/note]] While astronauts will ''bounce'' on the moon, they would not be able to jump nearly as high on Jupiter as they can here on Earth.
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Martian gravity is strong enough that it would not affect how a human moved, and the difference in the speed of falling objects would drop would not be noticeable.


* ''Film/TheMartian'' doesn't even try to simulate Martian gravity, which means Mark is moving around like he was on Earth. [[Literature/TheMartian The novel]] was better about this, since Andy Weir didn't have to worry about an effects budget.

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