Explain why H-R diagrams look different for star clusters of different ages.?

How does the location of the main-sequence turnoff point tell us the age of the star cluster?

physics and astronomy

1 Answer

  • 1 decade ago
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    If the cluster is very old or very young, more stars in it are off the main sequence (that contains normal middle-aged starts)

    The older the cluster the fainter the main sequence turn-off

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