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An eclipse season is a period, roughly every six months, when eclipses occur. Eclipse seasons are the result of the axial parallelism of the Moon's orbital plane (tilted five degrees to the Earth's orbital plane), just as Earth's weather seasons are the result of the axial parallelism of Earth's tilted axis as it orbits around the Sun.
Each eclipse in this period is a member of a preceding saros series, always occurring on alternating nodes. [3] Thix This eclipse cycle is just over 36 tzolk'ins, lasting 317 lunations. Each eclipse in this period is followed by an eclipse 4 saros series' later, always occurring on the same node. [3] Inex
The saros (/ ˈ s ɛər ɒ s / ⓘ) is a period of exactly 223 synodic months, approximately 6585.321 days (18.04 years), or 18 years plus 10, 11, or 12 days (depending on the number of leap years), and 8 hours, that can be used to predict eclipses of the Sun and Moon.
The window of totality is just 3 minutes and 38 seconds, with variance for location, and begins at 3:20 p.m. ... The next total solar eclipse to pass over any part of the contiguous United States ...
An eclipse cycle constructed by Hipparchus is described in Ptolemy's Almagest IV.2: . For from the observations he set out he [Hipparchus] shows that the smallest constant interval defining an ecliptic period in which the number of months and the amount of [lunar] motion is always the same, is 126007 days plus 1 equinoctial hour.
The rarity of today's event has many curious about the nature of eclipses and the difference between the two kinds.
The total solar eclipse occurring on April 8 is expected to trace a wider ... April’s eclipse will also have longer period of totality than 2017 because of the moon’s proximity to Earth ...
In one saros period there are 239.0 anomalistic periods, 241.0 sidereal periods, 242.0 nodical periods, and 223.0 synodic periods. Although the orbit of the Moon does not give exact integers, the numbers of orbit cycles are close enough to integers to give strong similarity for eclipses spaced at 18.03 yr intervals.