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Question
What is the meaning of the solar constant?A) the regularity of the 11 year sunspot cycle
B) the fact that features on the Sun appear to never change
C) the stability of the Sun's luminosity for as long as life has existed on Earth
D) the amount of energy the Earth receives per unit area and unit time
E) the fact that the amount of hydrogen turning into helium in the core is fixed
Answer
This answer is hidden. It contains 1 characters.
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