> I've read that in ancient pre-flood times, there are reports that the
> night was never black, but a deep blue, which was attributed to diffusion
> of starlight by the water vapor/fog in the upper atmosphere.
I wouldn't doubt this --- have you ever seen pictures of the stars from
around clear skies (like at the observatories in Hawaii or in third-world
countries)? Almost always, when far enough from city lights, you'll see
the light from stars is a muddy blue - and their sheer number is enormous.
Any high-altitude vapor would freeze, forming a high-altitude fog, which
would most certainly scatter/reflect light on a variety of frequencies.
On the other hand - I wonder if liquid water exists in significant amounts
in the upper atmosphere? Remember the stories of fish raining down on
unsuspecting communities? :)