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Astronomy pictures of the week (2012.11.11-11.17) (9)

Xinhua)  10:08, November 17, 2012

Colorful Clouds Near Rho Ophiuchi. Fine dust illuminated from the front by starlight produces blue reflection nebulae. Gaseous clouds whose atoms are excited by ultraviolet starlight produce reddish emission nebulae. (Photo/ NASA)


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(Editor:黄蓓蓓、张洪宇)

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