Earth, Sun and Moon

Sunspots

NASA image of sunspots
Sunspots at solar maximum
Credit: NASA/SOHO

The visible surface of the Sun is called the photosphere. Sunspots are darker, cooler regions on the bright, hot photosphere. Whilst the photosphere has a temperature of around 6000°C, sunspots are between 3000°C and 4000°C.


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