If you find yourself in (1) Norway or other northern places ar night, you might be lucky enough to see the aurora borealis, or northern lights Seeing (2) lights is an experience. Sometimes they look like (3) band of green colour across (4) sky, and at other times they look like (5) curtains of purple, red and green. large magnet What causes them? Energy from (6) sun stirs up atoms high up in (7) atmosphere. The Earth is like (8) and it traps (9) atoms. These atoms then release their energy, and this produces light. Exactly (10) same thing happens in the far south, where (11) lights are known as (12) aurora australis.
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