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Why are about 90% of stars found on the main sequence?

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  1. Most stars are newborn
  2. That is where stars spend most of their lives
  3. Other stars are too faint to see

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References

  1. Astronomy 2e, 18.4 The H-R Diagram openstax.org/books/astronomy-2e/pages/18-4-the-h-r-diagram Checked 2026-10-10.

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