General relativity describes the behavior of gravity on cosmic scales, bending spacetime and shaping the very fabric of the universe from "summary" of The God Equation by Michio Kaku
In the vast expanse of the cosmos, where galaxies dance through the emptiness of space, a force governs their movements - gravity. But not just any form of gravity; it is the gravity described by general relativity, a theory that goes beyond the simple attraction between objects on Earth. General relativity delves into the very essence of gravity on a cosmic scale, where space and time intertwine to create a tapestry of spacetime. When we think of gravity, we often envision a force that pulls objects towards each other. However, general relativity introduces a new perspective - gravity as the bending of spacetime itself. Imagine the universe as a vast trampoline, with massive objects like stars and planets creating deep wells in the fabric of spacetime. Smaller objects, like comets and asteroids, then move along the curves created by these gravitational wells, following the path of least resistance through the warped spacetime. This bending of spacetime not only affects the motion of celestial bodies but also shapes the very structure of the universe itself...
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