General Relativity
In general relativity, the gravitational potential is replaced by the metric tensor. When the gravitational field is weak and the sources are moving very slowly compared to light-speed, general relativity reduces to Newtonian gravity, and the metric tensor can be expanded in terms of the gravitational potential.
Read more about this topic: Gravitational Potential
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—Ludwig Wittgenstein (1889–1951)
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—Albert Einstein (1879–1955)