Final answer:
The notion that Saturn's rings formed 4.6 billion years ago with its moons is likely false, as recent findings from the Cassini mission suggest that Saturn's rings might be much younger and have a dynamic structure influenced by small moons and other factors.
Step-by-step explanation:
The statement that Saturn's rings formed along with its moons 4.6 billion years ago is likely false. The age of Saturn's rings has been a subject of debate among scientists. While the rings could have formed from the breakup of a Mimas-sized moon early in the solar system’s history, the Cassini mission revealed that Saturn’s rings have a complicated structure with changes observed over time, suggesting they may not be as old as the planet and its moons. The main rings of Saturn are massive, comparable to Saturn's moon Mimas, but the solar system has become more stable over time, making a recent catastrophic event to form the rings less likely. Moreover, the presence of condensations or small moons embedded in the rings, which influence their structure, have been observed thanks to the Cassini mission, implying a dynamic and potentially younger ring system.