SaTellite is a visualization and navigation tool for a hypermedia system. SaTellite supports navigation in hypermedia. It is based on the concept of affinity between objects; that is, a relationship with an associated intensity. The user is presented with a two dimensional map that provides a view of the hypermedia environment where objects lying close together have some affinity in the sense defined by a chosen measure. The system provides for different views by modifying the underlying measure of affinity. The system is also able to track dynamically the evolution of the objects' relationships. Based on the affinity concept, we develop new dynamic presentation techniques that do not depend on the explicit display of links between the nodes of the graph.