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2008/12/18镜像同步5 回复

Baily's Beads near Solar Eclipse Totality Credit & Copyright: Leonid Durman Explanation: Just before the Sun blacks out, something strange occurs. As the Moon moves to completely cover the Sun in a total solar eclipse, beads of bright sunlight stream around the edge of the Moon. This effect, known as Baily's beads, is named after Francis Baily who called attention to the phenomenon in 1836. Although, the number and brightness of Baily's beads used to be unpredictable, today the Moon is so well mapped that general features regarding Baily's beads are expected. When a single bead dominates, it is called the diamond ring effect, and is typically seen just before totality. Pictured above, a series of images recorded Baily's beads at times surrounding the recent total solar eclipse visible from Novosibirsk, Russia. The complete series can be seen by scrolling right. At the end of totality, as the Sun again emerges from behind the moon, Baily's beads may again be visible -- but now on the other side of the Moon. 2008 August 18 日食附近的倍里珠说明: 在太阳完全变黑之前，有些奇怪的事情发生了。当月亮完全遮住了太阳之后，太阳的光线从月亮的边缘射出，产生一连串的亮珠，这就是所谓的贝利珠现象，因为英国天文学家Francis Baily于1836年日食时首次注意到此现象而得名。在过去，人们无法预测贝利珠的数量与亮度，但是如今，由于对月亮表面已经相当了解，已有可能粗略预测贝利珠的大致特征。如果只有单一个亮珠主宰，则称之为钻石环效应（daimond ring effect），通常发现在全食之前。上图所显示的倍里珠变化系列照片是最近在俄罗斯的新西伯利亚观测日全食时拍摄的。当太阳开始生光时，贝利珠又会在日面边缘的另一侧出现。

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