unechartreusesvp t1_j3gdvay wrote
Reply to comment by cld1984 in Earliest evidence of the use of the Mesoamerican 260-day calendar, ‘centuries earlier than its previously known use in textual records,’ revealed by the orientations of newly-uncovered ruins along Mexico’s southern Gulf Coast by marketrent
Actually not only sun and moon, but also Venus, and other celestial objects.
Many sites include some astronomical observation points, done of them to keep the solar year calendar in place, like knowing when to add more days to accommodate the 365 solar year in conjunction with the the solstices.
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