ge·gen·schein 
(gāgən-shīn′)
(gāgən-shīn′)n.
A faint glowing spot or region in the sky, occasionally visible exactly opposite the position of the sun, consisting of sunlight scattered by interplanetary dust particles. Also called counterglow.
[German : gegen, against (from Middle High German, from Old High German gegin) + Schein, light (from Middle High German schīn, from Old High German scīn, from scīnan, to shine).]