von Tom Van Flandern
The speed of gravity: what the experiments say
Tom Van Flandern
WWW 2006. 15 S. URL http://www.metaresearch.org/cosmology/speed_of_gravity.asp – Erstmals in: Physics letters. A. 250.1998, S. 1-11.
S. 1: „Abstract. – Standard experimental techniques exist to determine the propagation speed of forces. When we apply these techniques to gravity, they all yield propagation speeds too great to measure, substantially faster than light-speed. This is because gravity, in contrast to light, has no detectable aberration or propagation delay for its action, even for cases (such as binary pulsars) where sources of gravity accelerate significantly during the light time from source to target.
By contrast, the finite propagation speed of light causes radiation pressure forces to have a non-radial component causing orbits to decay (the „Poynting-Robertson effect“); but gravity has no counterpart force proportional to v/c to first order. General relativity (GR) explains these features by suggesting that gravitation, unlike electromagnetic forces, is a pure geometric effect of curved Space-Time, not a force of nature that propagates.
Gravitational radiation, which surely does propagate at light-speed but is a fifth order effect in v/c, is too small to play a role in explaining this difference in behavior between gravity and ordinary forces of nature. Problems with the causality principle also exist for GR in this connection, such as explaining how the external fields between binary black holes manage to continually update without benefit of communication with the masses hidden behind event horizons. These causality problems would be solved without any change to the mathematical formalism of GR, but only to its interpretation, if gravity is once again taken to be a propagating force of nature in flat Space-Time with the propagation speed indicated by observational evidence and experiments: not less than 2×10^10c. Such a change of perspective requires no change in the assumed character of gravitational radiation or its light-speed propagation.
Although faster-than-light force propagation speeds do violate Einstein special relativity (SR), they are in accord with Lorentzian Relativity, which has never been experimentally distinguished from SR-at least, not if favor of SR. Indeed, far from upsetting much of current physics, the main changes induced by this new perspective are beneficial to areas where physics has been struggling, such as explaining experimental evidence for non-locality in quantum physics, the dark matter issue in cosmology, and the possible unification of forces.
Recognition of a faster-than-light-speed propa-gation of gravity, as indicated by all existing experimental evidence, may be the key to taking conven-tional physics to the next plateau.“
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- 6. Februar 2013