Indian astronomical siddhantas assumed that at the commencement of the Kalpa all the planets including Ketu were in conjunction (at the same celestial longitude) at the first point of Mesha and the ascending node (Rahu) of the Moon was 180 degrees away (i.e., at the first point of Tula).<ref name=":1">Balachandra Rao, S. (2014) Indian Astronomy. Concepts and Procedures. Benguluru : M.P. Birla Institute of Management</ref> | Indian astronomical siddhantas assumed that at the commencement of the Kalpa all the planets including Ketu were in conjunction (at the same celestial longitude) at the first point of Mesha and the ascending node (Rahu) of the Moon was 180 degrees away (i.e., at the first point of Tula).<ref name=":1">Balachandra Rao, S. (2014) Indian Astronomy. Concepts and Procedures. Benguluru : M.P. Birla Institute of Management</ref> |