Philosopher Kant  in 1755 A.D., expounded the theory of
solar system which was systematized in 1796 by Laplace on mathematical grounds.
This system asserted the Sun is stationery and around which all planets revolve
in orbits in the same plane, their movements being East to West. Keplar derived
the laws regarding the motion of the planets. The phenomenon of eclipses and New
moon were explained. May be these were the foundations to enunciate the
coincidence of all the orbits of the planets and the equator in the same plane.
There is a conspicius absence of any reference regarding the position of stars
in layers and movement of the planets in accord with relation to the stars
positions as shown in the fig.


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