eldude2879

eldude2879 t1_ixvxcai wrote

using newton is not good enuff for precise calculations of planets

we have to use einstein, by that we have to stop thinking of gravety as a force and think of curved space time

Einstein's general relativity states that, in a Schwarzschild spacetime (which approximates our solar system), gravity is slightly different from the inverse square law by an extra fourth power term. It is this extra small term that causes the perihelion motion of Mercury's orbit. If we take this extra term into account and follow the same logic of classical considerations, we find that planets' orbits aren't closed, but are precessing consistently. Mercury's orbit has an apprant precession about 43 arcs per century at its perihelion position which is exactly the amount of precession observed.

https://physicsworld.com/a/correcting-einsteins-calculation-of-the-orbit-of-mercury/

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