How to understand Einstein's equation for general relativity

How to understand Einstein's equation for general relativity

Countless scientific tests of Einstein's general theory of relativity have been performed, subjecting the idea to some of the most stringent constraints ever obtained by humanity. Einstein's first solution was for the weak-field limit around a single mass. The Einstein field equations appear very simple, but they encode a tremendous amount of complexity. What looks like one compact equation is actually 16 complicated ones, relating the curvature of spacetime to the matter and energy in the universe. It showcases how gravity is fundamentally different from all the other forces, and yet in many ways, it is the only one we can wrap our heads around. Although Einstein is a legendary figure in science for a large number of reasons — E = mc², the photoelectric effect, and the notion that …
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