An unmanned Nasa spacecraft designed to track and link with other orbiting craft failed to rendezvous with a United States military satellite 765km above the earth, Nasa said.
The 225kg Demonstration of Autonomous Rendezvous Technology (Dart) craft had a mishap in orbit that caused it to divert its path.
The Dart craft, 1.8m long and 0.9m in diameter, was supposed to manoeuvre within 5m of the satellite, a Nasa spokeswoman said, but came within 90m of its target.
Nasa spacecraft misses target
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