It is possible that the pool was constructed not only as a water supply and swimming venue but also as a mirror to reflect the stars at night in order to make astronomical calculations. (travelyucatan.com)
Beginning with astronomical calculations of the orbit of Halley's comet in the 1700's this practice continued through to applications such as atomic weapons development during World War II. (proftimobrien.com)
Modern attempts to date the birth of Jesus by astronomical calculations concerning the brightness of a star are not reliable either, since the visit of Wise Men from the east is almost certainly legendary. (religion-online.org)