人类学家解开了玛雅人819天计数之谜(2)

当研究人员突发奇想，想把819天用来代表所有已知行星的会合周期的时间延长很多年的时候，他们发现一切都很完美。例如，他们发现，819乘以20等于16380(大约45年)。土星（Saturn）378天的会合周期的13个周期加起来是4914天，相当于6乘以819（6 ′ 819 = 4914）。
类似地，同样的过程也可以用来显示在接下来的45年里所有已知的行星何时会出现在天空中。他们还注意到，在数学中使用的天数(16380)恰好是260的倍数，这意味着819天周期的20轮与玛雅一般历法中的卓尔金历(Tzolk"in)相匹配。
研究人员得出结论，早期的玛雅天文学家只是简单地延长了时间周期，以预测所有行星的会合周期。
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Boffins think they"ve decoded mysterious 819-day Mayan calendar
Abstract
Arguably the most enigmatic of the Maya calendar cycles, the 819-day count has challenged modern scholars for decades. Even today it is not completely explained and there are several areas for further research, including its relationship with the synodic periods of the planets visible to the naked eye. Earlier research has demonstrated a four-part, color-directional scheme for the 819-day count such that each of the calendar stations progress in increments of 819 days in cycles of 4 × 819 days. Although prior research has sought to show planetary connections for the 819-day count, its four-part, color-directional scheme is too short to fit well with the synodic periods of the visible planets. By increasing the calendar length to 20 periods of 819-days a pattern emerges in which the synodic periods of all the visible planets commensurate with station points in the larger 819-day calendar.