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Sites belonging to NASA or sponsored by NASA. If a site is not directly NASA initiated or sponsored by NASA it belongs in another category.
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. It represents a breakthrough in the way NASA explores space, with lower-cost, highly focused planetary science investigations designed to enhance our understanding of the solar system. All completed Discovery missions have achieved ground-breaking science within strict cost and schedule limitations, each taking a unique approach to space exploration.
The mission of the Explorers Program is to provide frequent flight opportunities for world-class scientific investigations from space utilizing innovative, streamlined and efficient management approaches within the following space science themes: Astronomical Search for Origins and Planetary Systems Structure and Evolution of the Universe The Sun-Earth Connection