Questions: Which statement about Saturn's rings is not true?

Which statement about Saturn's rings is not true?
Transcript text: Which statement about Saturn's rings is not true?
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Solution

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Solution Steps

Step 1: Analyze Each Statement

Let's analyze each statement to determine which one is not true about Saturn's rings:

  1. Statement 1: "Some features of the rings are shaped by small moons that actually orbit within the ring system."

    • This statement is true. Small moons, known as "shepherd moons," can influence the shape and structure of the rings through their gravitational effects.

  2. Statement 2: "The rings are so thin that they essentially disappear from view when seen edge-on."

    • This statement is true. Saturn's rings are extremely thin, often less than a kilometer thick, making them nearly invisible when viewed edge-on from Earth.

  3. Statement 3: "The large gap known as the Cassini Division is shaped by an orbital resonance with the moon Mimas, which orbits well outside the rings."

    • This statement is true. The Cassini Division is indeed influenced by an orbital resonance with Mimas, which affects the distribution of particles in the rings.

  4. Statement 4: "The rings must look much the same today as they did shortly after Saturn formed."

    • This statement is not true. The rings are dynamic and can change over time due to various factors such as gravitational interactions, collisions, and the influence of Saturn's moons. They may not look the same as they did shortly after Saturn formed.
Step 2: Identify the Incorrect Statement

Based on the analysis, the statement that is not true is the one suggesting that Saturn's rings have remained unchanged since the planet's formation. The rings are subject to change and may not look the same as they did in the past.

Final Answer

The statement that is not true about Saturn's rings is:
\(\boxed{\text{The rings must look much the same today as they did shortly after Saturn formed.}}\)

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