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22. COMPARISON WITH MODERN SCIENCE
The standard values for the tropical year and annual precession in longitude determined by Simon Newcomb for the epoch 1900.0 (mean noon at Greenwich 31 December 1899) are

The sidereal year and its precession may be derived from these values. Table V compares the astronomical quantities used in the construction of Hindu cosmological time cycles with those of Simon Newcomb for the epoch 1900.0. There is very close agreement between the length of the year as measured by Hindu cosmological time cycles and that determined by modern science. If the great antiquity of the cycles can be further demonstrated by other evidence, astronomers might do well to look more closely at the supposition that the rotation of the Earth is being sensibly retarded by "tidal friction".
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