Tourists just south of the Arctic Circle were treated to a stunning display as the Northern Lights lit up the night sky in Rovaniemi, Finland on Friday (December 9).
Just after 2300 local time (2100 GMT) atmospheric conditions on the sun fuelled another breathtaking display, turning the skies a swirling green and prompting tourists and locals alike to rush outside to watch.
Local stargazers say that the Northern Lights appear due to a high coronal hole on the surface of the sun, coupled with strong solar winds.
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