This is the Gegenschein, derived from a German word meaning "counterglow," since it is always opposite or "counter" in position to the sun in the sky.    From Wordnik.com.  [SPACE.com] Reference

• there is sufficient material at the-Earth-Moon libration points L4 and L5 to produce a solar counterglow of 20 S10 Vis brightness.    From Wordnik.com.  [Opportunity Finds Another Big Meteorite | Universe Today] Reference