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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
December 31st 1899 are :
| 1 tropical year |
= 365.2421988 |
| precession in one year |
= 50".2564 |
The sidereal year and its precessional constant may be derived
from these values.
1 sidereal year ( 1900.0 ) = ( 360" / ( 360" - 50".2564 )) x (
365.2421988 ) + 1
= 366.2563627 diurnal revolutions of the Earth
precession in longitude in one year = ( 365.2563627 / 365.2421988
) x ( 50".2564 )
The following shows the astronomical quantities used in the construction
of Hindu cosmological time cycles with those of Simon Newcomb for the epoch
1900.0
| QUANTITY |
HINDU |
NEWCOMB |
DIFFERENCE |
| constant of precession |
50".4 / yr |
50".2583 / yr |
0".1417 / yr |
| sidereal year ( solar ) |
365.2563795 |
365.2563627 |
1.4 sec / yr |
| tropical year |
365.2421756 |
365.2421988 |
- 2.0 sec / yr |
The sidereal year in the above table refers to the number of solar civil
days it takes for the earth to orbi the sun in relation to any particular
star. The former is a sidereal-diumal relation and the later is a sidereal-solar
relation. The very close agreement between the length of the year as measured
by Hindu cosmological time cycles and that determined by modern science,
together with the demonstrated greal antiquity of the cycles, shows that
the rotation of the Earth is not being sensibly retarded by "tidal friction"
or any other cause. Astronomers today would do well to look for lack of
accuracy in their measurement of the Sun's mean motion and to the variations
of long periods in the rotation of the Earti to explain the so-called slowing
down of the earth. |