First American in Space: Freedom 7
Credit: NASA

 
Beat by the Soviet Union but not out of the space race, NASA bounced back on May 5, 1961, when Mercury astronaut Alan Shepard launched into space atop a Redstone rocket to become the first American spaceflyer. But unlike the Soviet Union's orbital success of cosmonaut Yuri Gagarin, Shepard's flight lasted just 15 minutes in a suborbital hop.
Number 8: Voyagers' Grand Tour
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