posted on Aug, 14 2009 @ 04:23 PM
This is being discussed in the Space Exploration forum.
As the article you posted says, it is perhaps caused by a yet-undiscovered moonlet, or perhaps (but less likely) an asteroid or comet.
Saturn is approaching an equinox (occurring every 15 years), and its ring plane is more in line with the Sun. Therefore shadows cast by bumps and
other perturbations in the ring system are much more noticeable because the shadows are much longer -- and Cassini is there this time to see those
The moonlet, asteroid, or comet mentioned in the article you posted coul be causing fluctuations in the orbits of ring materials, just like Saturn's
caused a "ripple" effect in the rings that was visible a few months ago (also made visible because of the equinox/long
Link to Daphnis
and "rippled" ring:
[edit on 8/14/2009 by Soylent Green Is People]