Page 667 - Lokmanya Tilak Samagra (khand 2)
P. 667
CHAPTER II
MEASUREMENT OF TIME
(VEDIC CALENDER)
( ASTRONOMICAL )
General astronomical discussion regarding the measure-
ment of time. Day, night, month, seasons, year, eras, cycles, Kali,
Precession of the equinoxes, Motions of the earth - yearly and
daily, the sun, the Moon etc. Vedic Calender published by
Captain Jervis at the end of his' Indian Metrology' 1834. Weber
1862, Thibaut 1877, Go~bole 1882, Dikshit 1896, Barhaspatya
1906, Sudhakar 1907.
Detailed explanation of the consequences of the precession
of equinoxes and the NaktJhatra system. Equating the lunar and
the solar year :-
D. H. M. s.
Lunar Month ( Siderial ) 27 7 43 11-5
Lunar Month ( Synodi-
cal, from New Moon
to New Moon) 29 - 12 44 2-87
29.530589 days.
Solar year ( Siderial) 365 6 9 9-6
Solar year ( Tropical ) 365 5 48 49·7
The difference - 0 0 20 19·9
The annual retreat of the
the equinoxes - 50·10
Time taken by the sun to
describe this arc of the
ecliptic 20 19·9
Solar Siderial year - 365 6 9 9·6
Lunar Synodical year 354 8 48 34·44
The difference 10 -21 20 35-16
