Tiny explosions add up to heat corona
Solar nanoflares may explain high temperature far above sun’s surface
![the sun in UV](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/04/cc_corona_free.jpg?fit=860%2C460&ssl=1)
HEAT SEEKER The EUNIS rocket split ultraviolet light from a region (white) of the sun into its component wavelengths (left, right), which revealed emissions from highly ionized atoms in a 10-million-degree plasma.
SDO/EUNIS/NASA