charles 2009-3-27 10:55
日冕
The Crown of the Sun
[img]http://i5.tinypic.com/2qtgxt0.jpg[/img]
影像版權與提供: Koen van Gorp
[color=navy]Explanation:[/color]
[color=dimgray]During a total solar eclipse, the Sun's extensive outer atmosphere or corona is an awesome and inspirational sight. The subtle shades and shimmering features of the corona that engage the eye span a brightness range of over 10,000 to 1, making them notoriously difficult to capture in a single picture. But this composite of 33 digital images ranging in exposure time from 1/8000 to 1/5 second comes very close to revealing the crown of the Sun in all its glory. The telescopic views were recorded from Side, Turkey during the March 29 solar eclipse, a geocentric celestial event that was widely seen under nearly ideal conditions. The composite also captures a pinkish prominence extending just beyond the upper edge of the eclipsed sun. [/color]
[color=navy]說明:[/color]
[color=dimgray]在日全食期間，名為日冕的太陽外層大氣是個扣人心弦的景觀。令人神迷的日冕之微妙層次和搖曳結構，亮度的反差超過一萬比一，因此非常難用單張照片來呈現。不過，上面這幅由33張曝光時間介於1/8000到1/5秒的影像所組合之照片，幾乎能捕捉日冕的完整風貌。這些望遠鏡影像是3月29日日食時，在土耳其的Side拍攝的。這次地球的日食事件，因天氣很理想所以廣大的區域都得見。這張組合影像也記錄了一個位在全食日盤頂端的粉紅色日珥。[/color]
[size=2]資料來源: Scientific American
Department of Physics, NCKU[/size][color=white][size=1]
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