If a planet has a mass of 70,000,000,000 kg and has two objects orbiting it, Object A 50,000,000 kg and 4,000 km away and Object B 80,000,000 kg and 7,000 km away. Which object is the planet exerting more gravity on, Object A or Object B? Which object is exerting more gravity on the planet, Object A or Object B? :-)