Lunar Eclipse
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(Redirected from Penumbral Eclipse)
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Lunar Eclipse
</dt>
The phenomenon observed when the moon enters the shadow of
the earth.
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A lunar eclipse is called penumbral
if the moon enters only the penumbra of the earth, partial if
the moon enters the umbra without
being totally immersed, and total if the moon is entirely immersed
in the umbra.
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References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use