Saturn's rings are made of particles moving in orbits around the planet. The inner edge of the closest ring has a radius of 6.7 104 km while the radius of the outer edge of the farthest ring is 4.8 105 km. The mass of Saturn is 5.69 X 1026 kg. a. Calculate the velocity of a particle near the inner edge of the closest ring. b. What is the period of this particle? How do the answers of 6a and 6b compare to the velocity and period of a particle orbiting near the outer edge of the farthest ring? C.