Lunar EclipsesImage Credit & Copyright: Igor Vin'yaminov
http://apod.nasa.gov/apod/ap130425.htmlThe dark, inner shadow of planet Earth is called the umbra. Shaped like a cone extending into space, it has a circular cross section and is most easily seen during a lunar eclipse. But the complete cross section is larger than the Moon's angular size in the stages of an eclipse. Still, this thoughtful composite illustrates the full extent of the circular shadow by utilizing images from both partial and ...
...and 23 more photos.
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