corona

In Cleveland, where eclipse-watchers were graced by clear skies, the Sun's corona was clearly visible, a brilliant halo framing the Moon.

The difference between the speed of the fast and slow solar wind is thought to be due to the different areas of the Sun's corona, the outermost layer of its atmosphere, that they originate from.

A change of host, especially from animals to humans, can greatly facilitate the spread of the virus, as the corona pandemic has emphatically demonstrated.

Each eruption, known as a coronal mass ejection, can contain billions of tons of plasma and magnetic field from the sun’s outer atmosphere, or corona.

Plasma can be observed in the natural world in the northern lights, or Aurora Borealis, and the Sun's corona during the recent solar eclipse.