How long will a 2 M_⨀ star live as a main-sequence star? A)12 million years B)180 million years C)1.8 billion years D)12 billion years E)18 billion years

Question

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The lifespan of a star on the main sequence is determined by its mass. A 2 M_⨀ star has a relatively low mass, and its main sequence lifespan is estimated to be around 1.8 billion years. Options A and B are too short for any star to go through the complete life cycle while option D and E are too long for a low mass star.

How Long Will a 2 M⨀ Star Live as a Main-Sequence

How Long Will a 2 M_⨀ Star Live as a Main-Sequence