Uploaded September 2016 | Updated September 2026, 1 hour ago

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CORRECTION: The Equinox happens about September 22 and March 20 each year (not December and June like I said in the video). Twice a year we have an Equinox, which is a great opportunity to measure a number of things about our Sun, to help determine the shape of the Earth.

Equinox calendar (plus other events): timeanddate.com/calendar/seasons.html

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