g = \frac{GM}{R^{2}} \frac{g_{∗}}{g_{⊙}} = \frac{\frac{GM_{∗}}{R_{∗}^{2}}}{\frac{GM_{⊙}}{R_{⊙}^{2}}} = (\frac{M_{∗}}{M_{⊙}} ) (\frac{R_{⊙}^{2}}{R_{∗}^{2}} )

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