GreenHornet is a graph analytics system that embraces the strengths of the traditional top-down and bottom-up approaches for graph visualization. It does this with a crossover concept to exploit the vast middle-ground information overlooked by the two extreme analytical approaches. It uses a graph coarsening technique to allow users to search or select parts of a graph, and then expand or contract the selected region separately from the unselected region, which can also be expanded or contracted on its own.