This picture shows a segment of a Galileo image of the Galileo Regio region on Jupiter's moon Ganymede. Features in the curved furrows that characterize this region can be seen even with very high sun illumination.
North is to the top of the picture.
The finest details that can discerned are about 80 meters across. This image was obtained before JPL started copyrighting their images and is in the public domain. All rights reserved.