Why are sunspots black? | Live Science

The sun is a great ball of fiery, electrically charged gas. As The sun as it goes through its regular 11-year solar cycle, electromagnetic activity on the star’s surface becomes increasingly chaotic. This turbulence inevitably leads to the appearance of sunspots — dark, planet-sized regions that form in the Sun’s lower atmosphere as a result of intense solar radiation magnetic disturbances.

Sunspots appear black to most visible-light telescopes. But why do they look like this and are they really black?

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