aurora borealis
noun/əˌrɔːrə ˌbɔːriˈeɪlɪs/
/əˌrɔːrə ˌbɔːriˈælɪs/
[singular] (also the Northern Lights [plural])
- bands of coloured light, mainly green and red, that are sometimes seen in the sky at night in the most northern countries of the worldTopics Spacec2
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aurora borealis