NASA launched its Active Magnetospheric Particle Tracer Explorers mission (AMPTE) from the Cape Canaveral launch pad.
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Space welcomed its first tourist from Earth.
NASA's Discovery Space Shuttle carried the Hubble Space Telescope into orbit.
American Astronomer William Henry Pickering discovered Phoebe, one of Saturn's moons.
Space Shuttle Discovery completed its last-ever mission and made its final landing onto Kennedy's runway at 11:57 am EST.
Two newly discovered moons orbiting Pluto were named Nix and Hydra.
