
\magnification=\magstep1

$$
{{ \rm (period\ in\  years)^2 } \over {\rm (semi-major\ axis\ in\ AU)^3 } } 
   \quad = \quad 
    {{ 1 } \over { \rm (mass\ of\ system\ in\ solar\ masses) } }
$$


$$
K \quad = \quad {{\rm (period)^2 } \over { \rm (semi-major\ axis)^3 } }
$$

$$
{\rm (period)^2 } \quad = \quad K * {\rm (semi-major\ axis)^3 }
$$


\bye
