May 15 marks this season’s total “super flower blood moon” eclipse — when the gleaming full moon in the spring casts an eerie red glow during an eclipse.
the Farmer’s Almanac. But this one’s extra special — because it’s also the first of two lunar eclipses in 2022, and slated to be a big one.
Skywatchers know that a moon is “super” when its orbit reaches one of its closest points to Earth — also called “in perigee” . Some astro-forecasters say that Sunday brings more of a semi-super moon — as there’s an ongoing debate in the scientific community about the true definition — which still makes for a pretty spectacular eclipse portion of the Americas, Antarctica, Europe, Africa and the East Pacific.A blood moon occurs only during a lunar eclipse and emits an orange-red glow during its several minutes of transit through Earth’s shadow, due to an optical illusion caused by our atmosphere.
Just before the eclipse peaks — or when the sun and moon are in perfect opposition — light that normally reflects directly off the lunar surface will be redirected through Earth’s atmosphere, filtering out the blues of the UV spectrum so that only the reds and oranges remain — hence the changing effect.
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