NASA's Discovery Program gives scientists the opportunity to dig deep into their imaginations and find innovative ways to unlock the mysteries of the solar system. When it began in 1992, this program represented a breakthrough in the way NASA explores space. For the first time, scientists and engineers were called on to assemble teams and design exciting, focused planetary science investigations that would deepen our knowledge about the solar system. As a complement to NASA's larger “flagship” planetary science explorations, the Discovery Program goal is to achieve outstanding results by launching more smaller missions using fewer resources and shorter development times. The main objective is to enhance our understanding of the solar system by exploring the planets, their moons, and small bodies such as comets and asteroids. Discovery advocates the testing and use of new technologies and applications. Each mission works with industry to transfer technologies used in the mission, especially those that enhance science acquisition and reduce cost. All completed Discovery missions have achieved ground-breaking science, each taking a unique approach to space exploration, doing what's never been done before, and driving new technology innovations that may also improve life on Earth.