aurora

n 1 au,rora bore`alis / bR:rI5eIlIs; 9bRrI`elIs/ (also the northern lights) bands of coloured light, mainly red and green, seen in the sky at night near the North Pole and caused by electrical radiation 北极光（在北极上空夜晚可见由电辐射产生的带状彩色光, 以红绿为主）. 2 au,rora au`stralis/ C5streIlIs; Rs`trelIs/ similar lights seen in the southern hemisphere 南极光（在南半球可见的类似的光）.

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