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.....And, in fact, I told Stewart this, the most beautiful sight in orbit, or one of the most beautiful sights, is a urine dump at sunset, because as the stuff comes out, and as it hits the exit nozzle it instantly flashes into ten million little ice crystals which go out almost in a hemisphere, because, you know, you're exiting into essentially a perfect vacuum, and so the stuff goes in every direction, and all radially out from the spacecraft at relatively high velocity. It's surprising, and it's an incredible stream of … just a spray of sparklers almost. It's really a spectacular sight. At any rate that's the urine system on Apollo.
..........— Russell Louis "Rusty" Schweickart [aka Schweikart] (1935 - ), American astronaut. Conversation with Peter Warshall, reported in Warshall's essay "There Ain't No Graceful Way: Urination and Defecation in Zero-G", Space World, Vol. P 1 181, pages 16-19 (Jan. 1979).
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