Scientists have long been unable to explain the mystery of why the Sun's outer atmosphere is hotter than its surface.
Scientists have long been unable to explain the mystery of why the Sun's outer atmosphere—or corona—is hotter than its surface. Now, a team of researchers has proposed a new hypothesis for why this might be the case.
The scientists propose that these so-called"Alfvén waves" reach a point known as the"Alfvén point" where they can no longer travel back to the Sun. These high temperatures cause the Sun's atmosphere to grow many times larger than the diameter of the star itself, and they're also responsible for the extended corona that is visible during solar eclipses.
"With Parker Solar Probe we will be able to definitively determine through local measurements what processes lead to the acceleration of the solar wind and the preferential heating of certain elements," Kristopher Klein, co-author of the study from the University of Arizona, said in a statement.
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