How Did Astronomers Discover the Relationship Between Spectral Type and Mass

question 104

Multiple Choice

How did astronomers discover the relationship between spectral type and mass for main sequence stars?

• A)by using computer models of hydrogen fusion and stellar structure
• B)by measuring stellar radii with very powerful telescopes
• C)by measuring the masses and spectral types of main- sequence stars in binary systems
• D)by comparing stars with the same spectral type but different luminosities

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