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Science Centric (4 Jan 2011 22:17 GMT) - During a total eclipse of the Sun, skywatchers are awed by the shimmering corona - a faint glow that surrounds the Sun like gossamer flower petals. This outer layer of the Sun's atmosphere is, paradoxically, hotter than the Sun's surface, but so tenuous that its light is overwhelmed by the much brighter solar disk. The corona becomes visible only when the Sun is blocked, which happens for just a few minutes during an eclipse…
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