Reply to post: Re: What is the sky?

USAF spaceplane back on Earth after mystery 2-year jaunt in orbit. Jeepers creepers, what has it been doing up here?

heyrick Silver badge

Re: What is the sky?

Their definition of "sky" probably has a lot to do with the thickness of the atmosphere and how far up one can go before the planes just won't go any further. Which, granted, is barely up at all in the celestial scale of things.

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