Back in the 80's, I had a long beer-fueled conversation with Jack Swigert, the command pilot for Apollo 13. He said that when they dumped the urine holding tank, the liquid would instantly crystallize in the cold and vacuum of space and, if the sun caught the crystals just right, he said it was a beautiful sight, a rainbow.
Then you realized what you were looking at ...
20 posted on 06/23/2019 3:11:30 PM PDT by IronJack
24 posted on 06/23/2019 8:21:56 PM PDT by DUMBGRUNT
("The enemy has overrun us. We are blowing up everything. Vive la France!"Dien Bien Phu last message.)