Auroral display, Greenland

Auroral display, Greenland

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Credit: JUAN CARLOS CASADO (starryearth.com) / SCIENCE PHOTO LIBRARY

Caption: Auroral display (aurora borealis) and star trail over a fjord in Tasiusaq, Greenland. This coloured light display is visible in the night sky, usually only at high latitudes. It occurs when charged and energetic particles from the Sun are drawn by Earth's magnetic field to the polar regions. Hundreds of kilometres up, they collide with gas molecules and atoms, causing them to emit light. Photographed in August.

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Keywords: 2011, arctic, astronomical, astronomy, astrophysical, astrophysics, atmosphere, atmospheric phenomenon, august, aurora, aurora borealis, aurorae, auroral display, charged particles, coloured light, coloured lights, fjord, greenland, magnetic field, meteorological, meteorology, night sky, northern, polar, solar activity, solar wind, space, space weather, star, stars, tasiusaq

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