Exam-style question
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What does the Hertzsprung-Russell diagram primarily classify stars by?.
- A.Color and size
- B.Luminosity and temperature
- C.Distance and brightness
- D.Chemical composition and age
Model answer
What a good answer should say
- Luminosity and temperature
Explanation
Why this works
The Hertzsprung-Russell diagram classifies stars based on their luminosity (intrinsic brightness) and surface temperature, which helps in understanding stellar evolution.
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