4πr3GT2=M\frac{4 \pi \mathrm{r}^{3}}{\mathrm{GT}^{2}}=\mathrm{M}GT24πr3=M
4π2r3GT2=M\frac{4 \pi^{2} r^{3}}{G T^{2}}=MGT24π2r3=M
4π2r2GT2=M\frac{4 \pi^{2} \mathrm{r}^{2}}{\mathrm{GT}^{2}}=\mathrm{M}GT24π2r2=M
4π2r9GT3=M\frac{4 \pi^{2} r^{9}}{G T^{3}}=MGT34π2r9=M