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  • Understanding Sunspots: Why Are They Dark?
    Sunspots appear dark because they are cooler than the surrounding photosphere (the visible surface of the Sun).

    Here's a breakdown:

    * The Sun's Temperature: The Sun's photosphere has an average temperature of about 5,500 degrees Celsius (9,932 degrees Fahrenheit).

    * Sunspots are Cooler: Sunspots are regions with temperatures around 3,800 degrees Celsius (6,872 degrees Fahrenheit).

    * The Illusion of Darkness: While still incredibly hot, the temperature difference of 1,700 degrees Celsius (3,060 degrees Fahrenheit) makes sunspots appear dark in comparison to the surrounding photosphere.

    * Radiation and Brightness: The Sun's brightness is directly related to its temperature. Hotter regions emit more light and appear brighter. Sunspots, being cooler, emit less light, creating the illusion of darkness.

    Think of it like a light bulb: A dim bulb appears dark compared to a bright one, even though it's still emitting light. The same principle applies to sunspots.

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