सिद्धान्तशिरोमणि: गणिताध्याय (भास्कराचार्य - ग्रहगणित, मध्यमाधिकार व स्पष्टाधिकार सटीक)

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days has to be calculated from the birth-time of this
Brahma, but Bhāskara rightly points out that it is a waste
of labour, for, all the planets must have returned to the
Zero-point of the zodiac ie the beginning of the Star Aswini
at the beginning of this Kalpa and hence it is sufficient to
calculate only from the beginning of this Kalpa. Further
Bhāskara states that when the very planets did not exist
during the last elapsed night of Brahma, what is the fun
of calculating their positions.
There is also a tradition that there are nine Brahmas
and that the present one is the very first. This tradition
Bhāskara does not mention, because he exclaims that he
does not know how many Brahmas have gone by, Time
being without a beginning.
Verse 27. In as much as the creation started only
from the beginning of this Kalpa which is the present day-
time of Brahma, and because deluge takes place at the end
of the day-time, the question of Computing the planetary
positions arises only when the planets exist. If some (the
allusion is to Vateswara) propose to compute the planetary
positions even when the very planets did not exist, may we
salute those great people !
Comm. Not necessary.
Verse 28. Six Manus have elapsed in this Kalpa,
thereafter twentyseven yugas, as well as three yugapādas
namely Kṛita, Tretā and Dwāpara. Further 3179 years of
this fourth yugapāda namely Kali have elapsed by the end
of the Saka king (which moment was the beginning of the
Saka era). Hence in the present Kalpa ie the day-time
of this Brahma, 19729 47179 years had elapsed upto the
beginning of the Saka era.
Comm. The computation is as follows :
6 Manvantaras = 6 × 71 × 10 Kaliyugas since each
Manvantara Consists of 71 yugas and a yuga Consists of