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fromwww.scientificamerican.com
4 days agoThe mathematical formula that reveals when Easter is every year
Easter Sunday is calculated as the first Sunday after the first full moon following the vernal equinox.
On the night of Sunday, September 7 into the morning of September 8, the sky will treat the majority of the world to a total lunar eclipse, also known as a "blood moon." For more than an hour, the full moon will slip into Earth's shadow and glow a deep, coppery red. Roughly 85% of the world's population will have a chance to see the total eclipse, making this one of the most widely visible celestial events of the year.