1. umbra
2. UmbraThe umbra, penumbra and antumbra are the names given to three distinct parts of a shadow, created by any light source. For a point source only the umbra is cast. These names are most often used to refer to the shadows cast by celestial bodies.
Read “Umbra” on English Wikipedia
Read “本影” on Japanese Wikipedia
Read “Umbra” on DBpedia
Read “Umbra” on English Wikipedia
Read “本影” on Japanese Wikipedia
Read “Umbra” on DBpedia
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