Exam-style question
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Describe the main sequence of stars in the Hertzsprung-Russell diagram and explain the characteristics of stars in this phase.
Model answer
What a good answer should say
- The main sequence is a continuous band on the Hertzsprung-Russell diagram where stars spend the majority of their life cycle.
- Stars in this phase are fusing hydrogen into helium in their cores, which results in a stable balance between gravitational collapse and thermal expansion.
- Characteristics include a range of temperatures and luminosities, with hotter stars being more luminous and cooler stars being less luminous.
Explanation
Why this works
This question tests the understanding of stellar evolution and the significance of the main sequence in the Hertzsprung-Russell diagram. A strong answer demonstrates knowledge of the processes occurring in stars and their relationship to the diagram's axes.
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