Space Explorations By s-rgiesa Oct 4, 1957 Spuknik Jan 1, 1958 Space Stations Aug 18, 1958 Pioneer Feb 5, 1961 Vanera Probe Jan 1, 1962 Mariner Aug 20, 1975 Viking Aug 20, 1977 Voyager #1 and 2 Apr 12, 1981 Shuttles Oct 12, 1989 Megellan Oct 18, 1989 Galileo Apr 24, 1990 Hubble Telescope Feb 17, 1996 N.E.A.R. Jul 4, 1997 The Mars Rover Oct 15, 1997 Cassini Aug 1, 1998 Genisis Spacecraft