n.a faint spot of light in the night sky that appears directly opposite the position of the sun; a reflection of sunlight by micrometeoric material in space
同义词：counterglow
英汉双解大词典
gegenschein/ˈɡeɪɡənˌʃaɪn/
1.
N（名词）
a faint glow in the sky, just visible at a position opposite to that of the sun and having a similar origin to zodiacal light 对日照 (Also called counterglow)