"Tony[B]" wrote:
> 
> > I don't really agree with Xplo about the sky.  It should be brighter
> > towards the sun and towards the horizon.
> 
> Could someone please decide which way it should go? :)

The reason the sky is brighter towards the horizon is the same reason
that the sky is blue; ie, light scattering. Light that hits the
atmosphere head-on doesn't get scattered much, since it has a minimal
amount of atmosphere to pass through, so it's kind of like looking at
space through a piece of glass. When it hits the atmosphere at an angle,
though, it hits a lot more air particles and gets scattered a lot.

If you want to test this for yourself, go outside on a sunny day and
look up.

The only reason the sky might appear brighter near the sun (at least,
enough to matter) is if there was enough haze in the air to give the sun
kind of a glare halo.. but this would be most apparent when the sun was
low, again, because when it's high it doesn't have a lot of haze to go through.

-Xplo

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