aurorae
['ɔ:roʊri:]
n.
北极光，南极光，黎明;
晨曦( aurora的名词复数 );
曙光;
朝霞;
北极光;
例句:
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Particularly strong aurorae have been observed at the Jupiter's and Saturn's poles.
来自SA
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On Earth, aurorae are more commonly known as the northern and southern lights.
来自MSN
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Discrete aurorae are usually seen only in the night sky, because they are not as bright as the sunlit sky.
来自BBC