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18. The temperature of the Sun's dark spots (i.e., the Sun's cooler Sun spots on the surface) is most nearly equal to:

a) 1,000,000 ºK
b) 4000 ºK
c) 15,000,000 ºK
d) 100 ºK
e) 6000 (or 5800) ºK

User Brazorf
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1 Answer

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The answer is B. If you need proof I can show you it!
User Pahariayogi
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