Only a piece of ashen moon occasionally climbs up or down the inside of the dome, and our local star without surcease explodes on our heads. We have really only that one light, one source for all power, and yet we must turn away from it by universal decree. Nobody here on the planet seems aware of this strange, powerful taboo, that we all walk about carefully averting our faces, this way and that, lest our eyes be blasted forever.