Two planets orbit each other in stable circular orbits at a distance D = 3.37 X 107 km. The planets have masses mp = 5.71 X 1024 kg and MP = 5.77 X 1025 kg. The center of the lower mass planet, mp, is at the origin. How far along the line joining the two planets is the center of mass of the system? COM = km Note: You can treat spherical bodies as point masses with all the mass at the center of the sphere. When solving this question, you can assume that all the mass mp is at the origin and all the mass MP is a distance D away. Part 3) The planets both travel in circular orbits around this center of mass. Use this to calculate the speed of the lower mass planet, mp. \"my