On Iapetus, surely?

http://saturn.jpl.nasa.gov/multimedi...cfm?imageID=12
70

In article .com, Dd
wrote:
The image shows a
long, very straight line across the moon. Does anyone have an idea what
this may be?

That, as the actress said to the convocation of bishops, is a
*very* good question.


--
Aidan Karley,
Aberdeen, Scotland,
Location: 57°10'11" N, 02°08'43" W (sub-tropical Aberdeen), 0.021233