Answer: gegenschein

AnswerCrossword Clue
gegenschein(German) a faint oval patch of light directly opposite the sun in the night sky, caused by reflection of sunlight by dust particles
gegenscheinA patch of very faint nebulous light sometimes seen in the night sky opposite the position of the sun. It is thought to be the image of the sun reflected from gas and dust outside the atmosphere
gegenscheina faint, elliptical patch of light in the night sky that appears opposite the sun, being a reflection of sunlight by meteoric material in space.