Official 53 Lec 4
Question 3 of 6
Why do astronomers suspect that new material has been added to Saturn’s ring system?

A.

The number of moons orbiting Saturn has increased over time.

B.

The rings exist in spite of Saturn’s gravity and magnetic pull.

C.

The tidal forces of Saturn are stronger than previously believed.

D.

The amount of water-ice in Saturn’s rings is smaller than previously believed.

正确答案:B

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