New archaeoastronomical research published in The Hindu has confirmed that the structural foundations of a 2nd-century BCE site in Ujjain were specifically aligned to track the "Path of Aryaman," a solar ecliptic reference found in the Rigveda. By using 3D laser scanning and celestial reconstruction software, researchers demonstrated that the site could predict equinoxes with a margin of error of less than 0.5 degrees.
This study provides critical physical evidence linking the theoretical astronomy of the Vedic texts to early historical observational practices. It suggests that Ujjain's status as the "Greenwich of India" was established much earlier than previously thought, serving as a sophisticated hub for timekeeping and the calculation of the lunisolar calendar.