Astronomical Evidence on the Age of the Rgveda

Astronomical Evidence on the Age of the Rgveda forms the supplement to this issue and explores how references to solstices, equinoxes and lunar phases in Vedic texts might help date the Rigveda. Dr. Narendra Nath Law reviews the arguments of Bal Gangadhar Tilak and Hermann Jacobi, who believed that passages in the Rigveda and Brahmanas recorded astronomical observations from as early as 4500 BCE. He outlines Theodor Thibaut’s criticism of their work and presents translations of key ritual passages from the Taittiriya Samhita and the Tandya Brahmana describing when year‑long sacrifices should begin. Law discusses the interpretations offered by Tilak and Jacobi, such as identifying the nakṣatra Phalguni with the year’s “mouth” and dating the start of the year to various full moons. He then analyses whether the data support a solar year beginning at the vernal equinox, the summer solstice or other points. The article evaluates the precession of the equinoxes and the shifting positions of constellations over millennia, synthesising calculations from various scholars. Law concludes that while astronomical clues in Vedic literature suggest that certain observations were made when the full moon was near specific stars, the evidence does not permit a precise determination of the Rigveda’s age. He cautions against taking mythological statements as literal astronomical records and stresses the uncertainties inherent in reconstructing ancient skywatching. The paper thus provides an exhaustive survey of past scholarship and contributes a balanced assessment to the long‑standing debate on the chronology of the Rigveda.

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