The Book of Akbar 50.1

50.1

Virgo then was. Similarly Virgo has moved to the station Libra, Libra to Scorpio and so on, up to the last Sign. Now the calculation of Indian astrologers is in accord with the observations of the ancient philosophers which were based on the notion that the Fixed Stars did not move. The calculation of the new observations is founded on the movement of the Zodiacal Heaven which has caused the constellation Leo to move to the House of Virgo. The difference between the two calculations is 17°, each Sign having moved 17° from its place. From this it may be known that 1190 years have elapsed from the observations of the Indian philosophers to the new ones, assuming that a degree is traversed every seventy years, and most philosophers are agreed that we should multiply 17 by 70. On the view of Ptolemy that the movement is one degree a century, the interval between the two sets of observations is 1700 years.