Jupiter’s moon was found to have a liquid ocean under a thick crust of ice.
The Galileo probe made the discovery.
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Cosmonaut Alexey Leonov made the first spacewalk when he left his Voskhod 2 spacecraft.
Pakistan established its national space agency, the SUPARCO.
The first spacewalk was made by the Soviet cosmonaut Georgy Grechko during Salyut 6 EO-1 mission.
The Space Shuttle Colombia launched from the Kennedy Space Center for a secret military mission.
Two newly discovered moons orbiting Pluto were named Nix and Hydra.
