Physics – General Physics
Scientific paper
2011-11-28
Physics
General Physics
12 pages, 3 figures
Scientific paper
The neoclassical time-retarded transverse gravitational field theory, a theory based on the slow-speed weak-field approximation to general relativity theory, has been used to explain exactly the flyby anomaly for six Earth flybys and the observed increase of 38 mm/year in the radius of the Moon's orbit (arXiv:1105.3857v8 [physics.gen-ph] 7Nov2011). It is known by astronomers that comets have an unexpected early or delayed return of a few days. The change in the period for Halley's Comet caused by the Sun's time-retarded transverse gravitational field is calculated herein. The calculated speed change depends on the value used for the induction speed. The induction speed that explains the flyby anomaly and the change in the Moon's orbit is about 10 km/s. The predicted change in the period for Halley's Comet, using 10 km/s, is only a few minutes. If the induction speed is set to 20 m/s, the calculated speed change is about one day, but such a low value seems improbable. To confirm the time-retarded theory, it is better to study the speed change in eccentric and inclined near-Earth orbiting spacecrafts.
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