The sketch above shows groups of stars on the H- R diagram, labeled (a)through (e); note that (a)represents the entire main sequence while (c)and (d)represent only small parts of the main sequence. Which group represents stars fusing hydrogen in their cores?

Question

Quizplus · Accepted Answer

Group (a) represents the entire main sequence, which is where stars fuse hydrogen in their cores to produce energy. Groups (b), (c), (d), and (e) represent different stages of stellar evolution after hydrogen fusion in the core has stopped. Therefore, the correct answer is (a).

The Sketch Above Shows Groups of Stars on the H-