mass–radius relation

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The relationship between the radius of a main-sequence star and its mass; it shows that radius is proportional to mass to the power 0.7. Thus a star of spectral type B, of 16 solar masses, has a radius of about seven times the Sun's, while a low-mass red dwarf of 0.1 solar masses has a radius about one-fifth of the Sun's.

Subjects: Astronomy and Astrophysics.

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