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arxiv: 1803.08346 · v2 · pith:OUU4BWAWnew · submitted 2018-03-21 · 🌀 gr-qc

Space and Space-Time geodesics in Schwarzschild geometry

classification 🌀 gr-qc
keywords geodesiclimitnon-relativisticschwarzschildspaceequationsgeometryorbit
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Geodesic orbit equations in the Schwarzschild geometry of general relativity reduce to ordinary conic sections of Newtonian mechanics and gravity for material particles in the non-relativistic limit. On the contrary, geodesic orbit equations for a proper spatial submanifold of Schwarzschild metric at any given coordinate-time correspond to an unphysical gravitational repulsion in the non-relativistic limit. This demonstrates at a basic level the centrality and critical role of relativistic time and its intimate pseudo-Riemannian connection with space. Correspondingly, a commonly popularized depiction of geodesic orbits of planets as resulting from the curvature of space produced by the sun, represented as a rubber sheet dipped in the middle by the weighing of that massive body, is mistaken and misleading for the essence of relativity, even in the non-relativistic limit.

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