The Main Sequence Has a Limit at the Lower End

question 34

Multiple Choice

The main sequence has a limit at the lower end because

• A) low mass stars form from the interstellar medium very rarely.
• B) hydrogen fusion combined 4 hydrogen nuclei to form 1 helium nucleus.
• C) pressure does not depend on temperature in degenerate matter.
• D) the lower limit represents when the radius of the star would be zero.
• E) there is a minimum temperature for hydrogen fusion.

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