The penumbra is the outer edge of the Earth’s shadow, lasting over six hours, and the umbra is the deepest part of the shadow, lasting 3.5 hours. The eclipse can be divided into the penumbral and umbral phases, according to Sky & Telescope magazine. William West/AFP/Getty ImagesĪ partial lunar eclipse occurs when part of the full moon falls under Earth’s shadow (unlike May’s total lunar eclipse) - more than 97% of the moon will be covered at the peak of the eclipse, according to NASA. Bonus points if it makes you want to dance.The last lunar eclipse in May was a rare "super blood moon," appearing brighter and larger than a normal full moon in a reddish hue.
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