gegenschein
ge·gen·schein
noun, often capitalized \ˈgā-gən-ˌshīn\Definition of GEGENSCHEIN
: a faint light about 20° across on the celestial sphere opposite the sun probably caused by backscatter of sunlight by solar-system dust
Origin of GEGENSCHEIN
German, from gegen against, counter- + Schein shine
First Known Use: 1877
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