If eclipses occur in repeatable patterns, then explain why an eclipse is not visible from the same place on Earth after one Saros cycle
What will be an ideal response?
Although the eclipse geometry repeats almost exactly, it is not visible from the same place on Earth. The Saros cycle is a third of a day longer than 18 years 11 days. When the eclipse happens again, Earth will have rotated a third of a turn farther east, and the eclipse will occur a third of the way westward around Earth. That means that after three Saros cycles (period of 54 years plus 34 days) the same eclipse occurs in about the same part of Earth.
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How might you test that prediction?
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