Corona
- Aura of plasma that surrounds the Sun and other stars
- Several million kilometers above the chromosphere
- Very hot
- Million degrees or more
- Heated by Sun's magnetic field
- 10 trillion times less dense than the sea level atmosphere on Earth
- Gases in this layer get blown into space
- Emits about half as much light as the Moon when it is full
- Only seen during an eclipse because the photosphere overpowers it