Black and Blue Skies

I've heard a person can climb so high
that they break through the atmosphere
down they see a blanket of blue
up they see a shroud of black

The sky is blue because as light fights its way to earth
color by color is stripped away
until all is blue

Some say the sky is black
because its not that old or that big
and as we look into the stars
we look back in time
to point before light.

And as I straddle these two worlds
I wonder which is right
is the sky black?
Or is it blue?

then I realize
they are the same sky
and the only difference is time.