Russian spacecraft Vega 2 landed on Venus.
The Vega 2 was a mission to explore both Venus and Halley’s Comet.
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SpaceShipOne completes the world's first manned private spaceflight.
Millions watch NASA spacecraft Ranger 9 crash into the Moon.
Viking I lands on Mars.
The last signal from the Pioneer 10 space probe was received.
NASA launched the first-ever active repeater communications satellite.
