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1 year ago in Cosmology By Shubham

Is there a point where gravity stops pulling and starts pushing?

If I jump up, gravity pulls me back down. But if I fly straight up in a rocket, is there a specific line where gravity 'lets go' and starts pushing me the other way?

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By Aamir Answered 10 months ago

Normal mass and energy the stuff of stars, planets, you always attract. There's no switch where gravity flips sign. But repulsive effects do exist in cosmology: dark energy, modeled as a cosmological constant, drives cosmic acceleration. It's not gravity reversing; it's a different phenomenon with negative pressure. So gravity never repels. But something else does, and we're still figuring out what.

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