1997 Event Galileo, 2nd Callisto Flyby, Orbit 9 1997 Event Galileo, 4th Ganymede Flyby (Orbit 8) 1997 Event Galileo, 3rd Ganymede Flyby (Orbit 7) 1990 Event Galileo Earth-1 Flyby 1989 Event Voyager 2 begins a flyby of planet Neptune 1986 Event Voyager 2, 1st Uranus flyby 1985 Event Flyby of Comet Giacobini-Zinner 1985 Event Suisei Launch (Halley's Comet Flyby) 1985 Event European Space Agency launches Giotto (Halley's Comet Flyby) 1974 Event Helios 1 launched by U.S., Germany; later makes closest flyby of Sun 1972 Event Pioneer 10 launched for Jupiter flyby 1969 Event Mariner 6 launched for Mars flyby 1967 Event Mariner 5 Launch, Venus Flyby 1962 Event Mariner 2 launched to Venus; flyby mission
