Age: 4.5 billion years.
Core: Solar energy is created here (15,000,000 degrees centigrade).
Photosphere: The surface of the Sun seen in visible light
(6,000 degrees centigrade).
Chromosphere: Layer right above the photosphere.
Corona: Outer part of the Suns atmosphere (1,000,000 degrees
Sunspots: Concentrations of magnetic flux. They appear dark
because they are cooler than the surrounding photosphere
(4,000 degrees centigrade).
Hydrogen 92.1 %
All Others 0.0015%
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