The End of the Life of a Red Dwarf Star

question 242

Multiple Choice

The end of the life of a red dwarf star is predicted to be a sphere of almost pure helium.But no such spheres have been detected.What do we believe is the reason?

• A) These helium stars are very dim and consequently hard to detect.
• B) There are very few red dwarfs, so their end products are expected to be rare.
• C) The evolution rate for red dwarfs is so slow that none has yet evolved to its end stage.
• D) Helium is a relatively light material, so these helium spheres are expected to dissipate in a short time.

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