ナショナルジオグラフィックのインスタグラム(natgeo) - 10月19日 19時44分

Video by Babak Tafreshi @babaktafreshi | With the end of summer, darker nights return to the Arctic latitudes. Here the Big Dipper stands high in the Iceland sky. The unusual light is known as a pulsating aurora. Although it’s faster in this time-lapse video, even in real time they shift and brighten in patches every second, rather than the typical arcs and streaks. Auroras are caused by energetic electrons speeding down into Earth’s atmosphere and colliding with the thin air on the boundary of space and our atmosphere.⁣ Down on Earth is the iconic Skógafoss waterfall. Explore more of the World at Night photography with @babaktafreshi. ⁣The soundtrack is "Red North" by Ali Raini, Tonelabs. ⁣⁣#saveournightsky #astrophotography #aurora #spaceweather

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