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Watch an aurora.
                                                                                                                                                                                                          Photo: SIGURDUR WILLIAM BRYNJARSSON, www.arcticshots.is




        Look up at night. In some places, you see                                                                                  Bits from the sun hit Earth’s sky. These bits cause


        colourful lights. They are called auroras.                                                                                 gas in the sky to glow.









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