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4 months 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 2 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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