On the H-R diagram, 90 percent of all stars are ____.

Question

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The Hertzsprung-Russell (H-R) diagram is a graphical tool that astronomers use to classify stars according to their luminosity, spectral type, color, temperature, and evolutionary stage. On this diagram, 90 percent of all stars, including our Sun, fall along the main sequence, which is a continuous and distinctive band of stars. These stars are in a stable phase of their life, fusing hydrogen into helium in their cores.

On the H-R Diagram, 90 Percent of All Stars Are