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temperature minimum (solar)
A level in the Sun's atmosphere, about 550 km above the base of the photosphere, where the temperature reaches a lowest point of 4,400 K. Above this level, to a height of about 1,000 km, the temperature rises steadily to about 6,000 K, then more rapidly at greater heights.
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• SOLAR TOPICSAlso on this site:
Encyclopedia of Alternative Energy & Sustainable Living
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