Classicly

Miriam was not unfamiliar with these subterranean regions. Illuminated by the electron light, and ventilated by the carbon process, and kept at an even temperature of seventy degrees Fahrenheit, they were wholesome and pleasant, and many thousands of the inhabitants never troubled themselves to appear above-ground from year’s end to year’s end. Except for the absence of sun, moon and stars, life in this artificial world was as agreeable and convenient as on the surface. But sun, moon and stars, and the fathomless depths of space, were indispensable to Miriam’s happiness.