Accelerate progress in our three core enterprises — Explore Worlds, Find Life, and Defend Earth. You can support the entire fund, or designate a core enterprise of your choice.
Mariner 10 NASA’s Mariner 10 was the first spacecraft to use a planet for a gravity assist. It flew past Venus in 1974 and then past Mercury on 3 occasions, in 1974 and 1975. NASA
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