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| physical phenomena > event > atomic process > collision > scattering > backscatter | 
| backscatter comparison table | |||||||
| Subject | has time of occurrence | changes property | has duration | is a kind of | has domain | has definition | has synonym | 
|---|---|---|---|---|---|---|---|
| gegenschein | direction | backscatter | atomic physics | Faint nebulous light about 20° across near the ecliptic and opposite the Sun, best seen in September and October. Also called counterglow. | counterglow | 
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