Cosmonaut Alexey Leonov made the first spacewalk when he left his Voskhod 2 spacecraft.
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Two newly discovered moons orbiting Pluto were named Nix and Hydra.
The super-bright comet 'Hale-Bopp' reached its closest point to Earth at a distance of 1.215 AU, making it visible to the naked eye.
President Richard Nixon passed a new law that allowed NASA to build America's first space shuttle.
German Astronomer Karl Ludwig Harding discovered the 3 Juno asteroid in the Asteroid Belt.
William Herschel discovered the first binary star.
