Mickelodean wrote:

Here are clumps as viewed by Cassini of bright patches or clumps in the
outer F ring that defy
explanation.

http://photojournal.jpl.nasa.gov/catalog/PIA05382

"Defy explanation" is rather an overstatement. "Not understood in
detail" would be more accurate.

--
Greg Crinklaw
Astronomical Software Developer
Cloudcroft, New Mexico, USA (33N, 106W, 2700m)

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