au·ro·ra bo·re·al·is
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 world
北极光