Exam-style question
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What does a star's luminosity indicate on the Hertzsprung-Russell diagram?.
- A.The star's distance from Earth
- B.The star's surface temperature
- C.The total energy output of the star
- D.The star's age
Model answer
What a good answer should say
- The total energy output of the star
Explanation
Why this works
Luminosity on the Hertzsprung-Russell diagram indicates the total energy output of a star, which is essential for classifying its type and understanding its lifecycle.
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