If a material is thicker, it should be less transparent, right?

It turns out that in Saturn’s rings, that’s not always the case. A new examination of the B ring shows that even though it’s the most opaque of Saturn’s rings, it’s not the densest one.

The puzzling result is not just isolated to this ring, either. Scientists have found similar results in other studies when looking at the gas giant’s other rings, NASA said. This latest research comes from using the Cassini spacecraft, which is slowly wrapping up investigations at Saturn since arriving there in 2004.

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