Ratio between the astronomical megalithic yardAny unit of length 2.7-2.73 feet long, after Alexander Thom discovered 2.72 ft and 2.722 ft as units within the geometry within the megalithic monuments of Britain and Brittany. (AMYA megalithic yard which, in inches, expresses the true astronomical ratio of mean solar months to lunar months.) as 945/29 and the lunar month of 29.53125 as 945/32 day-inches.