Aurora borealis, time-exposure image

Aurora borealis, time-exposure image

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Credit: BABAK TAFRESHI/SCIENCE PHOTO LIBRARY

Caption: Aurora borealis and star trails over mountains, time-exposure image. This coloured light display (the northern lights) is visible in the night sky at high latitudes. It occurs when charged and energetic particles from the Sun (the solar wind) 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 March, near Kirkjufell, Iceland.

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Keywords: arctic, astronomical, astronomy, astrophysical, astrophysics, atmosphere, atmospheric, aurora, aurora borealis, aurorae, auroral, auroras, boreal, celestial, color, colored, colors, colour, coloured, colours, earth science, glow, glowing, green, iceland, icelandic, light display, lights, long exposure, long-exposure, magnetic, march, meteorological, meteorology, mountain, mountains, natural, nature, night, no-one, nobody, north, northern, northern lights, physical geography, physics, polar region, purple, red, solar activity, solar wind, space weather, star trail, star trails, stars, time exposure, time-exposure

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