Before landing astronauts on the moon, the Apollo 11 space vehicle was put into orbit around 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 the moon were 1,861 km and 1,838 km. Calculate the mass of the moon according to these data.
Calculate the ratio of masses (moon to earth).
Calculate the ratio of densities (moon to earth).