65.9 MB (6.0 MB compressed)
5906 x 3900 pixels
50.0 x 33.0 cm ⏐ 19.7 x 13.0 in (300dpi)
CHRIS MADELEY / SCIENCE PHOTO LIBRARY CHRIS MADELEY / SCIENCE PHOTO LIBRARY
Photographer shooting the Aurora Borealis and night sky by the Dietrich River in Northern Alaska. The aurora borealis (northern lights) is a coloured light display that 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.
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