In the Hertzsprung-Russell (H-R) diagram, where do the majority of stars, including our Sun, spend most of their stellar lifetimes?
Answer and explanation
Correct answer: D. along the main sequence, stably fusing hydrogen into helium in their cores
- Step 1: Stars spend ~90% of their lives on the main sequence fusing hydrogen into helium in hydrostatic equilibrium. Answer: along the main sequence, stably fusing hydrogen into helium in their cores. Why not the others: Giants and white dwarfs represent terminal evolutionary phases.
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