Gegenschein or counterglow is a faintly bright spot in the night sky centered at the antisolar point. The backscatter of sunlight by interplanetary dust causes this optical phenomenon, being a zodiacal light and part of its zodiacal light band.

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Facts from Wikidata (CC0). Image by ESO/Y. Beletsky via Wikimedia Commons (CC BY 4.0).

gegenschein

faint brightening of the night sky in the region of the antisolar point

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