vega By Cuabo Dec 15, 1984 Launch of Vega 1 Period: Dec 15, 1984 to Jun 11, 1985 Vega 1 travels from Earth to Venus Dec 21, 1984 Launch of Vega 2 Period: Dec 21, 1984 to Jun 15, 1985 Vega 2 travels from Earth to Venus Jun 11, 1985 Vega 1 reaches Venus Period: Jun 11, 1985 to Jun 11, 1986 Vega 1 travels from Venus to Halley's Comet Jun 15, 1985 Vega 2 reaches Venus Period: Jun 15, 1985 to Jun 15, 1986 Vega 2 travels from Venus to Halley's Comet Jun 11, 1986 Vega 1 encounters Halley's Comet Jun 15, 1986 Vega 2 encounters Halley's Comet Jan 17, 1987 Vega 1 & 2 encounter Halley's Comet a second time