Tiny explosions add up to heat corona

Solar nanoflares may explain high temperature far above sun’s surface

the sun in UV

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

A relentless onslaught of tiny explosions buffet the solar atmosphere, researchers report.