The place on the H–R diagram where stars settle into the longest, most stable portion of their lifespan a. the horizontal branch. b. the instability strip. c. the birth line. d. the zero-age main sequence. e. none of the above.
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| a. |
the horizontal branch.
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| b. |
the instability strip.
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| c. |
the birth line.
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| d. |
the zero-age main sequence.
|
|
| e. |
none of the above.
|
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