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Unformatted text preview: Corona is much much hotter than the chromosphere due to spicules Coronal holes: energy and gas flowing out. Solar wind Sun is losing millions of tons every second, but relatively speaking this is nothing. In its entire existence, its only lost .1% of its mass (halfway through its life) The Active Sun Sunspots: middle = umbra, 4500 K. region around that is penumbra = 5500 K. beyond that is photosphere, 5800 K Last from 1 100 days...
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- Fall '08