A thousand years later, Winter Solstice no longer occurred near Aries (Asvini) due to precession. As a result, Ashwinis were no longer rising heliacally as before. They were still below the horizon at sunrise around Winter Solstice time. The Winter Solstice had moved to Revati by 6000 BC. Thus the precession of Equinoxes and Solistices was being observed by Rigvedic Scholars.
The Sky of 19th December, 6000 BC at sunrise on the Winter Solstice day shows that Ashvini gave way to bright star Chitra (α Vir) on opposite side (Western horizon). A full Moon in Chitra Nakshatra provided a new time marker in the sky and heralded the lunar month naming system-Chaitra, Vaisakha etc. (Rigveda: 5-74-1,2 and Tait Samh. 7-4-8). See Fig. 2 -
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2. Subramanian Swamy. 2008. Rama Setu: Symbol of National Unity.
3. Srimad Valmiki Ramayana (Hindi).
4. Srimad Valmiki Ramayana (English).