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Astronomy pictures of the week (11.25-12.1) (8)

People's Daily Online)  08:11, December 03, 2012

Clouds Near the Edge of Space. Noctilucent or night-shining clouds lie near the edge of space. From about 80 kilometers above Earth's surface, the icy clouds can still reflect sunlight even though the Sun itself is below the horizon as seen from the ground. (Photo/ NASA)


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【11】 【12】

(Editor:姚春、王金雪)

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