Hayanaratna · by Balabhadra
Chapter 1 · Planets, Signs, Year Entry
ग्रहराशिस्वरूपवर्षप्रवेशाद्यानयनाधिकारः
उक्तञ्च सूर्यसिद्धान्ते ॥शास्त्रमाद्यं तदेवेदं यत्पूर्वं प्राह भास्करः ॥युगानां परिवर्तेन कालभेदोत्र केवलमिति ॥
And it is said in the Surya Siddhanta: This is that same first science that the Sun told long ago. Only the time differs here, by the turning of the yuga (age of the world).
Simple meaning: Surya Siddhanta: the science is the old one; only time has moved on through the ages.
वसिष्ठसिद्धांतेपि ॥
Vasishtha Siddhanta: in every age the Sun, Moon and planets drift from the old figures.
विस्रंसनं विस्रस्तिः । शिथिलत्वमिति यावत् ॥
The word visrasti: it means slipping or getting loose.
सिद्धान्तसुन्दरेपि॥
When a gap is seen in the sages' figures: correct only that gap, not the whole method.