APOD:2015.9.19

Sweet丿Kim (金) 天王星
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发表于:2015-09-24 12:47 [只看楼主] [划词开启]

日珥 

影像提供与版权: 

Alan Friedman (Averted Imagination)

说明: 

在9月16日,这道怪异白炽电浆悬浮在扭曲环状的磁场之内,蜿蜒向太阳的东侧地平线伸展。使用后院望远镜和只能透过电离氢发光的窄波段滤镜所记录的影像,呈现了悬在太阳临边上方的这道庞大日珥。跨幅约600,000公里的这道磁化电浆,让太阳系内的天体相形见小。因为最大气态巨行星─木星的直径在143,000公里左右,而地球的直径则不到13,000公里。这个外观上被分类为篱笆状日珥的巨大结构非常不稳,因为这种大型日珥经常会发生爆发。

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A Prominence on the Sun 

Image Credit & Copyright: Alan Friedman (Averted Imagination)

Explanation: This eerie landscape of incandescent plasma suspended in looping and twisted magnetic fields stretched toward the Sun's eastern horizon on September 16. Captured through a backyard telescope and narrowband filter in light from ionized hydrogen, the scene reveals a gigantic prominence lofted above the solar limb. Some 600,000 kilometers across, the magnetized plasma wall would dwarf worlds of the Solar System. Ruling gas giant Jupiter can only boast a diameter of 143,000 kilometers or so, while planet Earth's diameter is less than 13,000 kilometers. Known as a hedgerow prominence for its appearance, the enormous structure is far from stable though, and such large solar prominences often erupt.




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