Main-sequence stars can be divided into those with more than 75 percent of the mass of the Sun and those with less than this amount of mass. What is different about these two groups?

Question

Quizplus · Accepted Answer

Stars in the more massive group have higher surface temperatures and luminosities than stars in the less massive group. This is because the more massive stars have a greater gravitational force, which causes them to contract more and become hotter. The higher temperatures in the more massive stars allow them to undergo nuclear fusion at a faster rate, which produces more energy and makes them more luminous.

Main-Sequence Stars Can Be Divided into Those with More Than