"The explosions are called nanoflares because they have one-billionth the energy of a regular flare," Jim Klimchuk, a solar scientist at NASA's Goddard Space Flight Center (opens in new tab) in Maryland, said in a statement. Research suggests that tiny explosions known as nanoflares may help push the temperature up by providing sporadic bursts reaching up to 18 million F (10 million C). When you're roasting a marshmallow you move it closer to the fire to cook it, not farther away." "Things usually get cooler farther away from a hot source. "That's a bit of a puzzle," Jeff Brosius, a space scientist at Catholic University in Washington, D.C., and NASA's Goddard Space Flight Center in Greenbelt, Maryland, said in a statement. Why the corona is up to 300 times hotter (opens in new tab) than the photosphere, despite being farther from the solar core, has remained a long-term mystery. As the gases cool, they become the solar wind. Temperatures in the sun's corona (opens in new tab) can get as high as 3.5 million degrees F (2 million degrees C). It appears as white streamers or plumes of ionized gas that flow outward into space. Like the chromosphere, the sun's corona can only be seen during a total solar eclipse (or with NASA's Solar Dynamics Observatory (opens in new tab)). The third layer of the sun's atmosphere is the corona.
(Image credit: NASA/SDO) (opens in new tab)
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