I did a simpler scene w/ a cone and a sphere w/ anything glows set as patrick said. I had a night scene w/ no ambient no other light. I then used a replicated terrain. Depending on the camera angle I got a glow near horizon, total blackness or if the terrain was lower could see objects better. I wonder if this could be a bug or just something difficult to do. I didn't try simple or infinite plane yet.

No need to think outside the box....
    Just make it invisible.