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Moons of our Solar System

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2.8 Are ring-particles moons?

Here’s a question for you to think about. Is it acceptable to refer to small ring-particles as moons, given that there is no official lower size limit to define a moon?

This is an image of Saturn and its rings imaged by NASA’s Cassini orbiter.

Figure 31 Saturn and its rings imaged by NASA’s Cassini orbiter in 2011 when the rings were oriented almost exactly edge-on to the Sun. (NASA/JPL/Space Science Institute)

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This is an image of Saturn and its rings imaged by NASA’s Cassini orbiter.

Figure 31 Saturn and its rings imaged by NASA’s Cassini orbiter in 2011 when the rings were oriented almost exactly edge-on to the Sun. ...

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2.8 Are ring-particles moons?