A satellite is being prepared for take-off on the surface of the fictitious planet Zeta. The planet Zeta has a radius of R and the satellite experiences a gravitational force, F, from the planet at the surface. A single moon, Eta, completes one orbit of the planet every 50 days at a distance of 5R from the center of the planet. The satellite is now placed into orbit 2R from the surface of the planet. Determine the Period of the satellite. 2. Relevant equations Well i assume you use (R^3 / T^2)A = (R ^ 3 / T ^ 2)B 3. The attempt at a solution Therefore 5R ^3 / 50^2 = 3R^2 / T^2 T is what we need, but i seem to always get 540 and am not exactly sure as to how to work it out. Am i using the wrong equation? or is my working out wrong? thanks.