ExEP science and missions represent a voyage of unprecedented scope and ambition, promising insight into humankind's most timeless questions: Where did we come from? Are we alone?

The primary goal of these explorations is to discover and characterize planetary systems and Earth-like planets around nearby stars. The scientific investigations and the missions that carry them out are designed to build on each other's success, each providing an essential step forward toward the goal of discovering habitable planets and evidence of life beyond.