Which of the following types of stars will spend the longest time (the greatest number of years) on the main sequence?

Question

Quizplus · Accepted Answer

The lifetime of a star on the main sequence is determined by its mass. The more massive the star, the faster it burns through its fuel and the shorter its life on the main sequence. K-type stars have a mass of about 0.6-0.8 solar masses, which is smaller than G, A, or O stars, and therefore they burn their fuel slower and spend the longest time on the main sequence.

Which of the Following Types of Stars Will Spend the Longest