Above chromosphere, low-density yellow layer {inner corona} extends from 9000 miles above surface to 300,000 miles above surface and is 10^5 to 10^6 K. Temperature is due mostly to solar flares. Alfven magnetic waves, whose field can oscillate but at constant pressure or which can change pressure like sound waves, affect temperature slightly. Corona temperature and density decrease over poles {coronal hole}.
Physical Sciences>Astronomy>Star>Sun>Layers
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Date Modified: 2022.0224