Images are one of the main objects of observational and experimental study in Planetary Sciences. Images are also a source of amazement for the general public, a formidable medium for transmitting knowledge and conveying the thrill of discovery. The World Wide Web is now a major channel of dissemination for science images. It is also the place where scientists seek information, publish their findings and confront ideas. Internet browsers have become portable, generic clients that are used not only to display remote information, but also to manipulate and modify it.