In article , Rskt wrote:
I also wonder if the probe around
Saturn ever turned back to take a picture of earth.

I don't recall hearing of any such, and considering that the camera are all
oriented in a direction perpendicular to the axis of the radio antennae, I would
doubt it was done - to point a camera at the Earth, the spacecraft would have to
be turned so that the antennae did not point towards Earth. Which would break the
radio connection. There are sub-systems for keeping the spacecraft's orientation
without direct control from the Earth, and for regaining orientation if some
unexpected event disturbed orientation. But the risk of triggering a malfunction
by trying to point the spacecraft off it's intended line probably wouldn't be
worth the result.
During the Earth fly-by (18th Aug 1999) ...
Nine of Cassini's 12 science instruments were turned on to make observations
of the Earth/Moon system. Scientific and engineering data from the Earth
flyby will be transmitted by Cassini to receiving stations of NASA's Deep
Space Network over coming days.

(From http://saturn.jpl.nasa.gov/news/pres...90817-pr-a.cfm , the
NASA press release.)
http://saturn.jpl.nasa.gov/news/pres...01230-sn-a.cfm has information
about the data acquired during the Jupiter fly-by.

http://ciclops.lpl.arizona.edu/view.php?id=77 has information from the imaging team
about photography of the Moon during the Earth fly-by.

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