Why isn't the Sun shrinking or expanding?
A) Because the Sun is spinning so fast, the centrifugal forces keep the surface of the Sun supported against collapse.
B) because the Sun is solid
C) because gas pressure balances gravity in the Sun
D) because the Sun has lived for billions of years
Correct Answer:
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Q4: What are coronal holes?
A)areas in the corona
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Q7: Based on its surface temperature of 6,000
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