why is the sky blue?

i found the rose garden at the botanical gardens here and i am SO excited. and there is a MARVELOUS climbing tree. lately i have been fascinated with nature and trees and sunsets and stars and flowers. i LOVE trees. they are so simple yet twisted and tangled. solidly rooted in the ground. beautifully bare before all the leaves and flowers come in the spring. strong and big, regardless of what goes on around them, storm or sunshine.
and flowers are so delicate and beautiful. and unique. how incredible is it that God decided to let them smell a little bit like heaven?! just sitting there, waiting for any passerby who wishes to stop and breathe in some beauty.
stars are kind of a given, but still! how remarkable! glorious death and life shining brighter, bigger and farther than any of our little minds can grasp.
sunsets and sunrises technically fall into the star category, but it's our little star. and the sky in general is thrown in with that too. just looking up makes me feel small, and in a bubble. the blue sky...the glorious colors of pink and golden and orange. is golden a color? it should be. sunbeams shining through the clouds is another magnificent sight. when you can see the light from the heavens coming down in such a tangible and specific way...wow.
why is the sky blue? i know there are scientific answers to that question, and reasons i wouldn't understand, but really...what if it were green or purple? God could just as easily have created our laws of physics and ultraviolet rays and whatever else to work in such a way that it would be perfectly normal to have a green sky. and we would be wondering why it's green. some child would say why isn't it blue? and the answer would be, that's perposterous! it's green because our light and rays and science makes it so. and all along we are just a little off kilter...
random sidenote.
so now i'm going to get excited about going to enjoy these things i've been telling you about...