Crown of Treatises: Chapter on Mathematics

He considered the Vedanga Jyotisha The "limb of the Vedas" pertaining to astronomy/astrology, used to determine the timing for rituals. to be very ancient. For this reason, while writing about the movement of the solstices in his Brihat Samhita, he stated—

"The southward movement of the sun once began from the middle of the constellation Ashlesha, and the northward movement from the beginning of Dhanishtha.
This was certainly the case at some time, as stated in the ancient scriptures." original: 'आश्लेषार्द्धाद्दक्षिणमुत्तरमयनं रवेर्धनिष्ठाद्यम् । नूनं कदाचिदासीद्येनोक्तं पूर्वशास्त्रेषु ॥'

In this verse, by using the phrase "ancient scriptures," he has recalled the Vedanga Jyotisha or perhaps the Parashara Tantra. In the work Indian Astronomy, the scholar Dikshit has written about the era of the Rig-Vedic and Yajur-Vedic astronomy using various arguments and evidence. It has been established as 1400 BCE. There are many controversies regarding its chronological determination. † The aforementioned Parashara Tantra is not currently available; a version has been found in some places, but it is a modern compilation because it contains a description of the precession of the equinoxes original: अयनगति (ayanagati), which was unknown in this country even in the fifth century. How then can it be considered the original Parashara Tantra? Parashara was the father of Krishna Dvaipayana Vyasa The traditional compiler of the Vedas and author of the Mahabharata.. According to the Nirukta An ancient treatise on etymology and lexicography., he was the son of Vashistha; however, according to the Mahabharata and the Vishnu Purana, he was the grandson of Vashistha and the son of Shakti. Some consider this Parashara to be the original author of the Siddhantas Scientific astronomical treatises., but the Siddhanta created by the first sage, Brahma, is the origin of all astronomy. The Brahma Siddhanta is another name for the Vedic Siddhanta, because the Vedas are the creation of Brahma. Be that as it may, the Parashara Siddhanta is the name of the Parashara Tantra itself. In many places in the Brihat Samhita, the commentator Bhattotpala has cited the opinions of Parashara and Garga in his commentary. Both are very ancient. According to astronomical calculations, between the fifth and fourteenth centuries BCE—

† By looking at the historical section of Barhaspatya’s Vedanga Jyotisha, knowledge of many subjects can be gained. Since it is in English, it does not benefit everyone. It is absolutely essential that the entire book be translated into Hindi.