Cassini had to pass the orbit of Jupiter before exploring Saturn. It used Jupiter's gravity to gain speed for its mission. Understanding the role of gravitational assists is crucial in space exploration. ;
Before reaching Saturn, the Cassini space probe had to pass the orbit of Jupiter, which provided a gravitational assist to increase its speed. This maneuver was essential for its mission, allowing it to reach its destination efficiently. Therefore, the correct answer is B. Jupiter.
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