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Shapiro time-delay measurement

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Summary

Radar ranging to planets measured the extra propagation time of signals passing near the Sun, testing the relativistic gravitational time delay.

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General relativityShapiro time-delay measurement

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Authored explanation

Radar ranging measured the additional delay predicted for propagation through curved spacetime near the Sun.

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The source theory, law, entity, prediction, or structural claim is directly tested, supported, constrained, or established by the target experiment or observation. Experimental support is not final logical proof; the edge detail states exactly what was measured.

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