美國天空出現不明火球 NASA：流星啦

美國喬治亞州天空，上周出現刺眼光芒，目擊民眾議論紛紛，但美國太空總署（NASA）稍早已出面證實，該道神秘的光線與火球，只是墜落地球的「流星」，NASA隨後公布短片，顯示流星穿越地球大氣層的路徑。
根據NASA報告指出，流星在距離地表約80公里的距離接觸大氣層，並燃燒產生光芒，而該顆流星原本以時速4.6萬公里極高速衝進地球大氣層，飛到喬治亞州蝗蟲林鎮上方時，減緩為時速1.4萬公里，接著亮光從螢幕上消失。
NASA認為，隕石摩擦地表燃燒後的碎片，有可能墜落在喬治亞州境內。

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NGC 3576 contains several clusters as star propagation has progressed sequentially east to west during the last several million years. The bright emission component extends some 100 light years across．．．較多 NGC 3576 contains several clusters as star propagation has progressed sequentially east to west during the last several million years. The bright emission component extends some 100 light years across and contains scattered small dark nebulae known as Bok Globules. Bok Globules are dense well defined concentrations of gas and dust named after the Dutch astronomer Bart Bok (1906-1983) who first defined them. Typically they possess 10 to 50 solar masses within a space of a single light year. Most commonly found within HII regions they are known to be cocoons of star formation, particularly the formation of double or multiple star systems. Text courtesy Rob Gendler. Thanks to Martin Pugh for data acquisition. (Bill Snyder, http://billsnyderastrophotography.com/. Individual images available for purchase) 較少

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Yahoo News | 拍攝者 Bill Snyder, http://billsnyderastrophotography.com/. Individual images available for purchase

2013年10月28日週一台北標準時間下午7時00分

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