- PENUMBRA Definition Meaning - Merriam-Webster
Every solar eclipse casts an umbra, the darker central area in which almost no light reaches the earth, and a penumbra, the area of partial shadow where part of the sun is still visible Penumbra can thus be used to describe any "gray area" where things aren't all black and white
- Umbra, penumbra and antumbra - Wikipedia
The penumbra (from Latin paene 'almost, nearly' and umbra 'shadow') is the region in which only a portion of the light source is obscured by the occluding body, and an observer in the penumbra experiences a partial eclipse
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- PENUMBRA Definition Meaning | Dictionary. com
A lunar eclipse happens when the Moon passes through the outer region of the Earth's shadow called the penumbra From BBC
- penumbra, n. meanings, etymology and more | Oxford English Dictionary
If the source of light be a point, the shadow is sharply defined; if the source be a luminous surface, the perfect shadow is fringed by an imperfect shadow called a penumbra
- penumbra - Wiktionary, the free dictionary
penumbra (plural penumbras or penumbrae or (obsolete) penumbræ) A partially shaded area around the edges of a shadow, especially an eclipse quotations
- penumbra noun - Definition, pictures, pronunciation and usage notes . . .
Definition of penumbra noun in Oxford Advanced Learner's Dictionary Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more
- Penumbra | Moon, Sun Shadow | Britannica
penumbra, (from Latin paene, “almost”; umbra, “shadow”), in astronomy, the outer part of a conical shadow cast by a celestial body, in which the light from the source is partially blocked—as compared to the umbra (q v ), the shadow’s darkest, central part, where the light is totally excluded
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