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A yellow dwarf is just a star, like all the other billion stars.

What makes it yellow, is it's temperature. A hotter star will appear white to blue, whereas a cooler star will appear orange to red.

Our Sun, a yellow dwarf comprises about 73% hydrogen and 25% helium. Because it is a population I star, it also contains many heavier elements, which accounts for its size and longevity.

The known percentages are:-

  • Hydrogen 73.46%
  • Helium 24.85%
  • Oxygen 0.77%
  • Carbon 0.29%
  • Iron 0.16%
  • Sulfur 0.12%
  • Neon 0.12%
  • Nitrogen 0.09%
  • Silicon 0.07%
  • Magnesium 0.05%
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14y ago

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