NASA lost radio contact with the Mars Polar Lander moments before the spacecraft entered the Martian atmosphere.
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The last signal from the Pioneer 10 space probe was received.
The crew of Skylab 4 returned to Earth.
A SpaceX Falcon 9 rocket ferried a US National Reconnaissance Office payload into orbit.
Apollo 9 and its crew returned to Earth after a 10-day mission orbiting Earth.
The Apollo 16 lunar module landed on the surface of the Moon.
