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凯发k8官网-凯发k8天生赢家一触即发官网 > tag标签 > coronal
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太阳北极点附近有一巨大的日冕洞
13-07-22 the european space agency/nasa solar and heliospheric observatory, or soho, captured this image of a gigantic coronal hole hovering over the sun's north pole on july 18, 2013, at 9:06 a.m. edt. coronal holes are dark, low density regions of the sun'...
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