Prior to landing astronauts on the moon, the Apollo 11 space vehicle was put into orbit about the moon. The mass of the vehicle was 9,979 kg and the period of the orbit was 119 min. The maximum and minimum distances from the center of moon were 1,861 km and 1,838 km. Compute the mass of the moon according to such data.
Compute the ratio of masses (moon to earth). Compute the ratio of densities (moon to earth).