Anyways, short answer to the question of the day, when you're looking at the stars, there's less atmosphere in the way than when you're looking at something on the horizon, so there's less refraction. This is, oddly enough, why the moon can appear yellow when it's near the horizon, but white when it's higher in the sky. Since the atmosphere scatters blue light, when there's more atmosphete between you and the moon, more blue gets scattered, so it looks more yellow. When the moon is overhead, there's less atmosphere to scatter the light, so it looks white.
