Science @ NASA - Moon Fountains:
"Back in 1956, two years before NASA was even created, Hal Clement wrote a short story called 'Dust Rag' published in Astounding Science Fiction, about two astronauts descending into a crater on the Moon to investigate a mysterious haze dimming stars near the lunar horizon. After discarding a wild guess that they were seeing traces of a lunar atmosphere--'gases don't behave that way'--they figured it had to be dust somehow suspended above the ground. In a conversation remarkable for its scientific prescience, one of the astronauts explains:"
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