In Images: Mysterious Night-Shining Clouds

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Edge of space

Credit: NASA

Astronauts can often see noctilucent clouds (called polar mesospheric clouds when viewed from space) as they orbit the Earth with their unique view of…Read More »

the planet's atmosphere . This image was acquired at an altitude of just over 200 miles in the pre-dawn hours of July 22, 2008 as the International Space Station was passing over western Mongolia in central Asia.   Less «
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