How Long a Main Sequence Star Remains on the Main

question 16

Multiple Choice

How long a main sequence star remains on the main sequence in the H-R diagram depends most strongly on

• A) its initial composition
• B) the number of companion stars or planets orbiting it
• C) its radial velocity (as measured from the spectrum)
• D) its mass
• E) its ability to fuse the element carbon into some other element

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