Astronomical Evidence on the Age of the Rgveda

Summary

This supplement investigates how astronomical references in Vedic literature can be used to estimate the antiquity of the Rigveda. The author, Dr. Narendra Nath Law, surveys rituals such as the year‑long sacrifice (samvatsara sattra) and analyses passages from the Taittirīya Saṃhitā and other Brāhmaṇa texts that mention the positions of stars and lunar mansions (nakṣatras). The article reviews earlier arguments by Bal Gangadhar Tilak, who suggested that the Kr̥ttikā (Pleiades) rising due east at the vernal equinox implies a date around 3000 BCE for the Veda. It discusses various “nakṣatra epochs” proposed by scholars, each based on aligning specific asterisms with solstices or equinoxes. The author scrutinises textual evidence describing the Kr̥ttikā‑series and Mṛgaśīrṣa‑series of nakṣatras and evaluates whether they refer to the same astronomical phenomenon or to different calendrical traditions. He points out that interpretations must account for precession and the internal chronology of Vedic literature. Through tabulated longitudes of principal stars at different epochs, the article compares calculations to dates suggested by Western astronomers like Jacobi and Tilak. The discussion also addresses ritual instructions about the timing of the Ekāṣṭakā and Śrāvaṇī ceremonies, which may reflect seasonal markers. After examining multiple lines of evidence, the author concludes that while astronomical observations provide valuable clues, they cannot yield an exact date for the Rigveda. The data suggest great antiquity, possibly in the second or third millennium BCE, but uncertainties in star identifications and textual layers preclude precise dating. Nevertheless, the analysis underscores the sophistication of Vedic astronomy and its integration into ritual practice, indicating that early Indo‑Aryan society had advanced knowledge of celestial cycles.