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Astronomy pictures of the week (11.25-12.1) (9)

（）  08:11, December 03, 2012

A Filament Across the Sun. Is that a cloud hovering over the Sun? Yes, but it is quite different than a cloud hovering over the Earth. The long light feature on the left of the above color-inverted image is actually a solar filament and is composed of mostly charged hydrogen gas held aloft by the Sun's looping magnetic field. (Photo/ NASA)


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（Editor：姚春、王金雪）

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