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The stone alignment 'Nilurallu' at Murardoddi is a megalithic monumentcontaining standing stones of 12 to 16 feet high that are arranged somewhat ina squarish pattern. This is one of the stone alignments listed by Allchin(1956) as a non-sepulchal array that might have some astronomical connotations.This impressive stone alignment seems to be similar to that at Vibhuthihalli,that was studied earlier, but constructed with much larger stones. Theobservations conducted by us show that the rows of stones are aligned to thedirections of sunrise (and sunset) on calendrically-important events, likeequinoxes and solstices. In contrast to Vibhuthihalli, the shadows of stonesprovide a means of measuring shorter intervals of time. Key words:Observational astronomy, megalithic astronomy, stone alignments, equinoxes,solstices, sunrises

The Astronomical Significance of 'Nilurallu', The Megalithic Stone Alignment at Muradoddiin Andhra Pradesh, India