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A solid piece of metal with the thickness of 5 layers of foil is just like 5 layers of foil except that, since it is a single solid piece, the "layers" are able to conduct heat (quite quickly!) directly from one to the next. If the layers are instead separated by vacuum, the conduction of heat is eliminated, and heat transfer is greatly reduced (radiative ...


DON'T. Yes, using IDL requires a valid license. If the code can be re-implemented in Python in a reasonable amount of time$^1$, do it. You might be helped along by astropy and pydl. The former provides a growing library of useful astronomy functions, the latter specifically targets reproducing astronomy IDL routines in Python (and is affiliated with ...

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