EARTH IS SPHERE

Although the discovery of Earthbeing round  is credited to  Greek astronomers . Interestingly, Indian astronomers had already claimed that Sun is a star and that earth is spherical long before the Greeks. It is documented that various attempts had been made to measure the circumference of earth during the Vedic periods. Aryabhatta deduced a formulation which proves that the Earth is  rotating on an axis.By estimating the value of pi to be 3.1416 he deduced the circumference of earth to be 39736 Kilometers which is only100 kilometers below its true value.In fact, in his book Aryabhatiya,he also asserts that the movement of heavenly bodies like the sun, the stars are all relative, and only earth is moving.“Just as a passenger in a boat moving downstream sees the stationary (trees on the river banks) as traversing upstream, so does an observer on earth see the fixed stars as moving towards the west at exactly the same speed (at which the earthmoves from west to east.”