National Geographic Travelのインスタグラム(natgeotravel) - 1月13日 23時43分

Photo by @babaktafreshi / The World at Night project
A crown is forming in the clear sky above this Arctic land. This is the most fantastic form of aurora, appearing overhead with fast moving rays and shapes. A crown appears for a few minutes only but lasts a very long time in your memory!
Typical green light of aurora is caused by solar particles colliding oxygen in Earth outer atmosphere, 100-300km above us. The purple is by particles that reach lower where nitrogen exist.
Follow me @babaktafreshi to explore the wonders and values of our natural night skies.
#saveournightsky #twanight #aurora #northernlights #nightphotography @natgeoimagecollection

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