In general relativity, geodesics are the paths that objects follow when they move through spacetime without any external forces acting upon them. The concept is an extension of the idea of straight lines in Euclidean geometry to the curved spacetime of general relativity. ### Key Points about Geodesics in General Relativity: 1. **Spacetime Curvature**: General relativity posits that gravity is not just a force but a curvature of spacetime caused by mass and energy.

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  1. Geodesic (mathematics)
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