Perfect Parabolas - Cindy X

As I sat in the dimly lit classroom, our teacher rambling on about orbital trajectory, his words tracing perfect parabolas but never going anywhere. I can’t help but look out the window. But what colour should it be?

I know the sky is blue because of the refraction of light as it travels through the atmosphere; but what is the colour outside of that? What colour is “nothingness”?

It’s tempting to think that it’s black, but the reason that anything is black is because it absorbs most light that hits it.
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Light travels through nothingness at the speed of light; when will it end?