Word: castruccio
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...major needs of a lunar colony will be electric power. Importing chemical fuel would be prohibitively expensive. Even a nuclear power plant would be an almost impossible cargo for earth-moon transportation. But the moon's vacuum, says Dr. Castruccio, makes conventional power plants unnecessary. The essential parts of a photoelectric tube, which on earth must be enclosed in vacuum-tight glass, can be laid out on the moon's airless surface, where they will produce electricity whenever sunlight hits them...