In 1993, the Yohkoh Obser
In 1993, the Yohkoh Observatory was launched to study how emissions from this interfered with helmet streamers, but a certain phenomenon caused a power shutdown in 2001. Bengt Edlen disproved the theory of a new element constituting this region, instead showing that this it is composed of highly ionized iron, nickel, and calcium, which are buffered by a one million Kelvin temperature. For 10 points, name this plasma region only visible during solar eclipses, which surrounds the Sun and comes from the Latin for "crown".
In 1993, the Yohkoh Observatory was launched to study how emissions from this interfered with helmet streamers, but a certain phenomenon caused a power shutdown in 2001.
{corona} [prompt on “{Sun}” before “{region}”]