A NASA Black Brant XII rocket launches on Saturday eveningcarrying the CARE experiment (Image: NASA)
From The New Scientist:
The study of Earth's mysterious noctilucent clouds got a boost on Saturday, when a rocket was launched to create an artificial cloud at the edge of space.
"Noctilucent", or night-shining, clouds float dozens of kilometres higher than other clouds, at an altitude of about 80 kilometres. Because of their height, they can be seen glowing before sunrise or after sunset as the sun illuminates them from below the horizon.
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