Shortly after Oenopides, in 432 BC, Meton and Euctemon discovered the better value of 18 years, equal to 223 months (the so-called Saros period).
Saros |
Şaroş pe Târnave, a town in Sibiu County, Romania, formerly Şaroşu Săsesc – meaning Saxon Şaroş
The period separating each of the 72 eclipses in the series is approximately 6585.3 days (18 years, 11 days); that period was first called a saros by astronomer Edmond Halley.