MLA Citation: Bloomfield, Louis A. "Question 1232"
How Everything Works 18 Oct 2017. 18 Oct 2017 <http://howeverythingworks.org/print1.php?QNum=1232>.
1232. I have read articles about research into anti-gravity. Do you think it is really possible? — JG
No, I don't think that anti-gravity is possible. The interpretation of gravity found in Einstein's General Theory of Relativity is as a curvature of space-time around a concentration of mass/energy. That curvature has a specific sign, leading to what can be viewed as an attractive force. There is no mechanism for reversing the sign of the curvature and creating a repulsive force—anti-gravity. I know of only one case, involving a collision between two rapidly spinning black holes, in which two objects repel one another through gravitational effects. But that bizarre case is hardly the anti-gravity that people would hope to find.

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