UTSA astrophysicist reveals the math behind eclipse predictions

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Read about the fascinating math behind eclipse predictions, as explained by UTSA astrophysicist Dr. Angela Speck.

– I’ve taken plenty of math classes in my day, but when it comes to figuring out when and where a total eclipse will occur, that’sThankfully, there are people far smarter than myself, including UTSA’s Dr. Angela Speck, who heads up the physics and astronomy department, who can explain such things.

”The moon isn’t always between us and the sun, and so you get kind of a weird mismatch when they do intersect. ‘Where is going to hit on the earth?’” she said. That seems very specific. Turns out, it’s got a name: the saros cycle. It’s defined as “a period of exactly 223 synodic months, approximately 6585.321 days, or 18 years, 10, 11, or 12 days , and 8 hours, that can be used to predict eclipses of the Sun and Moon. Weirdly enough, out of all of that, it’s the 8 hours that throws everything off.

 

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