Assertion: sun's temperature | /r/CapableOf | drop to a minimum of 4,000 k
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Source sentences:
text: While the temperature of the Sun drops from 15,000,000 K at the centre to 5,800 K at the photosphere, a surprising reversal occurs above that point; the temperature drops to a minimum of 4,000 K, then begins to rise in the chromosphere, a layer about 7,000 kilometres high at a temperature of 8,000 K.