Kepler's Third Law
$$\frac{T_1^{2}}{T_2^{2}} = \frac{a_1^{3}}{a_2^{3}}$$
T1, T2 - orbital periods of planets
a1, a2 - semi-major axis (semiaxis) of the orbit
a1, a2 - semi-major axis (semiaxis) of the orbit
Find
It is known that:
= 