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Understanding the nature of spacetime curvature is key to interstellar travel from "summary" of The Science of Interstellar by Kip Thorne
In order to embark on interstellar travel, one must first come to grips with a fundamental concept of physics: the nature of spacetime curvature. This concept lies at the heart of understanding the possibilities and limitations of traversing vast cosmic distances. Spacetime, as described by Einstein's theory of general relativity, is not a rigid, fixed grid, but rather a dynamic, flexible fabric that can be warped and curved by the presence of matter and energy. This curvature of spacetime can manifest itself as gravity, bending the paths of objects moving through it. When we consider the imm...
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