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Why Is NASA Creating Clouds in the Sky Over Many Countries Around the World?
These artificial clouds are produced by releasing chemical compounds from high-altitude probes, typically at elevations between 80 and 400 kilometers above the Earth’s surface. The primary ...
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Rare rainbow clouds lit up the Arctic sky for 3 days – see the stunning photos
Sky watchers in the ... typically form at an extremely high altitude, between 9.3 and 15.5 miles above the surface. Live Science says this is higher than clouds typically form, but the extreme ...