 How often does the Lunar colony get supplies delivered from earth?
Once in two weeks Earth-time a rocketship came around the horizon from Lunar City with stores for the colony deep underground. There were air-tight bulkheads for safety, and a hydroponic garden to keep the air fresh, and all sorts of things to make life possible for men under if not on the Moon. Not one passenger disembarked even for Lunar City. The second luxury liner took off with only four passengers and turned back before reaching the Moon. Workers for the lunar mines could make the trip under heavy sedation. But there was a marked shortage of artists' materials on the Moon. All freight had to be hauled from Earth, on a voyage equal to rather more than a thousand times around the equator of the Earth.
 Every two weeks
 Every twelve days  Every three months  Once a month  Every two weeks