Re: Why isn't it used (more) on Earth yet?
"It's a very, very good fridge. But unless you're very space constrained, it's cheaper to use something twice as thick and a tenth of the price."
There's one thing it does even better than thermal insulation for the next best thing that's twice as thick - SOUND insulation.
Aerogels are extremely popular for uses such as installation on common walls in terrace houses, as the cost is nothing compared to the loss of living space incurred with any other option (for actual thermal insulation if the building isn't double brick then the insulation is best hung on the outside of the brickwork to prevent the fabric of the building getting cold and damp, at which point thickness isn't an issue anymore and aerogels cost far too much)
Biting the hand that feeds IT
