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Title: Astronomical orientations of the megalithic stone circles of Brahmagiri
Authors: Kameswara Rao, N
Keywords: Megaliths - the seasons
Issue Date: Mar-1993
Publisher: Astronomical Society of India
Citation: BASI, Vol. 21, No. 1, pp 67-77
Abstract: The megalithic stone circles at Brahmagiri which have been dated as 900 BC show clear astronomical orientations. The site lines from the center of a circle to an outer tangent of another circle points out to the directions of the sunrise and moon rise (full) at the time of solar and lunar solstices and equinox. Site lines towards the maximum azimuthal elongation of the then circumpolar star beta UMi (which also happens to be the brightest star near the pole) indicates that the time of the establishment of these Megaliths is earlier than 600 BC, may be between 900 to 600 BC. The megalithic people were probably aware of the 18.61 year period of the moon's solstice in addition to keeping track of the sideral day, the season and the year.
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