0 abbreviation for National Aeronautics and Space Administration: the US government organization that is responsible for space travel and the scientific study of space --
1 abbreviation for National Aeronautics and Space Administration (= the US government organization that plans and controls space travel and the scientific study of space) --
In 1977, NASA sent two spacecraft, Voyager 1 and Voyager 2, on a mission to explore the planets Jupiter and Saturn.
