When was Rig Veda civilization established

[paul linus]

Astronomic texts from the Vedic Brahmana support dating of the Rig Vedic Civilization from between 6000BCE and 4500BCE based on references to constellations and equinoxes. This anomaly was first pointed out by Professor H Jacobi of the University of Bonn and Asian scholar B Tilak in the 19th Century