Why would a bright full Moon suddenly become dark?
Because it entered the shadow of the Earth.
Almost two weeks ago this exact event happened as the Moon underwent a
total lunar eclipse.
visible from the half of the Earth then facing the Moon,
was captured in
numerousspectacularphotographs and is depicted in the
above time lapse video covering about an hour.
Mt. Lemmon Sky Center in
keeps the Earth shadow centered and shows the Moon moving through it from west to east.
between Earth, Moon, and Sun will show itself again
precisely half a moon-th
(month) later -- when part of the Earth will pass through part of the new Moon's shadow.
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