The Sun's corona, invisible to the human eye except when it appears briefly as a fiery halo of plasma during a solar eclipse, remains a puzzle even to scientists who study it closely. Located 1,300 miles from the star's surface, it is more than a hundred times hotter than lower layers much closer to the fusion reactor at the Sun's core.
from Latest Science News -- ScienceDaily https://ift.tt/2I9iEQI
Tuesday, 8 May 2018
Why does the Sun's Corona sizzle at one million °F?
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