Answer:
The sun's corona is only visible during a solar eclipse.
Step-by-step explanation:
The corona is the luminous envelope of the Sun that we usually see during solar eclipses.
It consists of plasma with approximately two million degrees Celsius. The high temperature causes a constant reaction of the atoms that compose it and that probably produces the solar wind, which is defined as a continuous flow of ionically charged particles that even influence the terrestrial climate. Particles of the solar corona can be electrons and protons in addition to subatomic particles.