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Originally Posted by djdugan
I recently read an article about "allias effect"
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Wikipedia:
Allais effect
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A recent published article on the topic in a mainstream scientific journal (Flandern, 2003) concludes that there have been "no unambiguous detections [of an Allais effect] within the past 30 years when consciousness of the importance of [experimental] controls was more widespread." This paper also suggests a mechanism that might cause slight gravitational variations during an eclipse (high speed high-altitude winds for which there is no observational evidence), but admits that "the gravitation anomaly discussed here is about a factor of 100,000 too small to explain the Allais excess pendulum precession... during eclipses".
A review article by Chris Duif, which surveys the field of gravitational anomalies in general, concludes that the question remains open, and that such investigations should be pursued, in view of their relatively inexpensive nature and the enormous implications if genuine anomalies are actually confirmed.
Exotic explanations for Allais and related effects have not gained significant traction among mainstream scientists.
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You can probably read a lot about it, both in this forum and about the Web, with the right search term.
Quote:
Originally Posted by djdugan
But during an full lunar eclipse, would we not experience a slight lessoning of gravity on earth, (as now we have Moon and Sun pulling in unison against earth's gravity) resulting in a increase in the speed (slight) of the pendulum ?
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Why wouldn't a "lessening of gravity" (if that's what you think happens) produce a decrease in pendulum speed? Think about a pendulum in microgravity: it would barely move.