Good point. Here's some more background on multi-layer insulation: http://en.wikipedia.org/wiki/Multi-layer_insulation http://en.wikipedia.org/wiki/Multi-laye

Good point. Here's some more background on multi-layer insulation: http://en.wikipedia.org/wiki/Multi-layer_insulation http://en.wikipedia.org/wiki/Multi-layer_insulation Of course, gold foil per se would end up being too heavy for a spacecraft thermal blanket.