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Astronomy pictures of the week (2012.12.2-12.8) (11)

（People's Daily Online）  08:06, December 10, 2012

Earth at Night. This remarkably complete view of Earth at night is a composite of cloud-free, nighttime images. The images were collected during April and October 2012 by the Suomi-NPP satellite from polar orbit about 824 kilometers (512 miles) above the surface using its Visible Infrared Imaging Radiometer Suite (VIIRS). (Photo/ NASA)


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（Editor：姚春、张茜）

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