vlopez1919ozeaw9
vlopez1919ozeaw9 vlopez1919ozeaw9
  • 01-05-2020
  • Chemistry
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What causes red giants expand to become larger than main-sequence stars?

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paytonawolfe
paytonawolfe paytonawolfe
  • 01-05-2020
When stars first begin to fuse hydrogen to helium, they lie on the zero-age main sequence. The core of a red giant is contracting, but the outer layers are expanding as a result of hydrogen fusion in a shell outside the core. The star gets larger, redder, and more luminous as it expands and cools.
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