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- red dwarf star- coolest main- sequence protostar stars.
- Temperature of about 2,000-3,500 k.
- These are small stars (0.08-0.5m)
- They have relatively low pressures , so low fusion rate. The energy generated is the product of nuclear fusion of hydrogen into helium (gas) by the way of the proton-proton.
- 7.5% the mass of the star Average red dwarf has 1/10,000th the luminosity of our sun
- The minimum mass a red dwarf must have to eventually evolve into a red giant is 0.25 M
- many red dwarf stars have gotten taken into black holes.
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