Physics
Scientific paper
Aug 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976natur.262..675v&link_type=abstract
Nature, vol. 262, Aug. 19, 1976, p. 675, 676.
Physics
3
Earth Planetary Structure, Earth Surface, Gravitational Constant, Angular Momentum, Atomic Clocks, Earth Rotation, Earth-Moon System, Ephemeris Time, Geodesy, Paleomagnetism, Paleontology, Surface Layers, Weight Reduction
Scientific paper
It has been suggested that the most probable explanation for observed differences between Ephemeris Time and Atomic Time would be a decrease in the gravitational constant. Such a decrease would mean that the earth is expanding somewhat. An investigation was conducted concerning such a possibility. The method used for determining the lengthening of the day was based on counting the number of tiny lines of ridges on well preserved epitheca of corals in their annual growth increments. No evidence for any expansion of the earth was found during the past 500 million years.
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