Class G main-sequence stars like our Sun make up about 7.5%, nearly one in thirteen, of the main-sequence stars in the solar neighborhood. Such a star has about 0.8 to 1.2 solar masses and surface temperature of between 5,300 and 6,000 Kelvin.

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K-type stars are orangish stars that are slightly cooler than the Sun. They make up about 12%, nearly one in eight, of the main-sequence stars in the solar neighborhood.

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Class M stars are by far the most common. About 76% of the main-sequence stars in the Solar neighborhood are class M stars.

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In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Showing the relationship between the stars’ luminosities versus their spectral classifications is done in the Hertzsprung-Russell diagram.

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