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2

Oh my, so much downvoting just for naivete! What this question is about is called aerial perspective. It's commonly seen with mountains, because they can be quite far from the observer: (image source) Of course, the mountains don't become more transparent the farther they are, they are just behind a thick layer of air that scatters sunlight into the ...


4

Much of the Unity spacecraft appears (almost) transparent in this image; you can see the blue sky right through it. This is absolute nonsense; you cannot see the sky through Unity's airframe. It is opaque. The upper surface of Unity is indeed painted mainly white. The underside appears to be painted in a dark blue and black iris-and-pupil design, providing ...


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Designing vessels that operate above ambient pressure is relatively straightforward since the outwards pressure tends to assist in keeping structure in shape (eg soft drink cans resist crushing better while sealed). Using hoops stress calculators in theory a one atmosphere pressure needs something like a paint thickness of additional material. Where this ...


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