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# Mass-Luminosity Relation

• The more massive stars are generally the more luminous
• Luminosity varies as the fourth power of the mass
• Can be used to find the distance to binary star systems

## Formula

• $\frac{L}{L_{sun}} = (\frac{M}{M_{sun}})^a$
• $L_{sun}$ and $M_{sun}$ are the luminosity and mass of the Sun
• $1 < a < 6$