ANCIENT Egyptian temples were aligned so precisely with astronomical events that people could set their political, economic and religious calendars by them. So finds a study of 650 temples, some dating back to 3000 BC. For example, New Year coincided with the moment that the winter-solstice sun hit the central sanctuary of the Karnak temple (pictured) in present-day Luxor, says archaeological astronomer Juan Belmonte of the Canaries Astrophysical Institute in Tenerife, Spain. Hieroglyphs on temple walls have hinted at the use of astronomy in temple architecture, including depictions of the "stretching of the cord" ceremony in which the pharaoh marked...