jay@npois.UUCP (Anton Winteroak) (02/17/86)
Mark is right, there are three cycles of the moon all between 18 and 19 years. Thank you Mark for looking it up. I believe, in retrospect, that the confusion I observed is between the 18.61 and 19 year cycles. In particular I recommend the book "Echos of Ancient Skies" as a book that gets these things mixed up. At present I am trying to imagine how there could be eclipse cycles of both 18 years 6 1/3 days, and 19 years no days, at the same time, but it has to be possible doesn't it.