Online Encyclopedia

PENUMBRA (Lat. paene, almost, umbra, ...

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Originally appearing in Volume V21, Page 124 of the 1911 Encyclopedia Britannica.
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PENUMBRA (
See also:
Lat. paene, almost,
See also:
umbra, a
See also:
shadow)  , in
See also:
astronomy, the partial
See also:
shadow of a heavenly
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body as
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cast by the
See also:
sun . It is defined by the region in which the
See also:
light of the sun is partially but not wholly cut off through the interception of a dark body .

End of Article: PENUMBRA (Lat. paene, almost, umbra, a shadow)
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