NASA lost radio contact with the Mars Polar Lander moments before the spacecraft entered the Martian atmosphere.
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The first commercial communications satellite is launched.
NASA launched the Viking 1 planetary probe toward Mars.
Russia's Luna 25 lunar lander mission crash-landed on the Moon.
SpaceX's Dragon became the first commercial spacecraft to dock at the International Space Station.
The Columbia space shuttle took off from the Kennedy Space Center in Florida for its final time.
