theoretically if an alien from another exoplanet with a much stronger gravity from ours comes here could that alien be able to levitate/fly on Earth?
In: Physics
No. Gravity means any object will still fall toward earth.
Now, if the aliens body was less dense than the earth’s atmosphere, then it’d float like a helium balloon. But that has nothing to do with the gravity of its home planet.
You can imagine animals from earth on a planet like Mars or even our Moon. Animals (and humans) capable of jumping will be able to jump higher due to less gravity. However, they will still land on the surface of the moon or mars. And because the moon doesn’t have any atmosphere and the mars has very little, birds and insects that fly on earth will not be able to fly at all.
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