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•  The Earth is not flat, has no support and has a power of attraction.
•  The north and south poles of the Earth experience six months of day and six months of night.
•  One day of Moon is equivalent to 15 earth-days and one night is also equivalent to 15 earth-days.
•   Earth’s atmosphere extends to 96 kilometers and has seven parts.
•There is a vacuum beyond the Earth’s atmosphere.
•  He had knowledge of precession of equinoxes. He took the value of its shift from the first point of Aries as 11 degrees. However, at that time it was about 12 degrees.
•Ancient Indian Astronomers used to define a reference point called ‘Lanka’. It was defined as the point of intersection of the longitude passing through Ujjaini and the equator of the Earth. Bhaskara has considered three cardinal places with reference to Lanka, the Yavakoti at 90 degrees east of Lanka, the Romak at 90 degrees west of Lanka and Siddhapoor at 180 degrees from Lanka. He then accurately suggested that, when there is a noon at Lanka, there should be sunset at Yavkoti and sunrise at Romak and midnight at Siddhapoor.
•Bhaskaracharya had accurately calculated apparent orbital periods of the Sun and orbital periods of Mercury, Venus, and Mars. There is slight difference between the orbital periods he calculated for Jupiter and Saturn and the corresponding modern values.
About 800 years back an intelligent mathematician and astronomer was born in Maharashtra. Unfortunately Maharashtrians have hardly taken cognizance of such a great man. It is good to see that new amateur astronomy clubs and centers are being named after him and there are awards given in his name. The concepts and methods developed by Bhaskaracharya are relevant even today.

Last Updated on Monday, 19 February 2007 11:14