The wikipedia article titled "Geodesics & General Relativity" opens with:(adsbygoogle = window.adsbygoogle || []).push({});

"the path of a planet orbiting around a star is the projection of a geodesic of the curved 4-D spacetime geometry around the star onto 3-D space."

Uhhhh.... "Real" spacetime has four dimensions - 3 space; 1 time. To map the precession of Mercury in "real" spacetime, GR practitioners MUST be projecting GR's "curved" spacetime onto "real" spacetime.

No?

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# 'Real' spacetime in GR?

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