United States: their own spy satellite crashed.

<P> Technology report (tech.) news: NASA has released a summary of the secret report revealed that in April 2005 NASA launched a robotic spacecraft, the first DART, its original purpose is no human .involved in the case of the other satellites in orbit rendezvous, but unfortunately hit his own spy satellites. .</ P> <P> inaccurate navigation data, crashing home satellite </ P> <P> investigators found that led to the robot spacecraft aboard DART collided with the spy satellite because it is not accurate because the navigation data. .</ P> <P> said, the ship's computer system on the robot spacecraft that the spacecraft is away from the satellite, but in fact it is the speed of 1.7 meters per second near the satellite. .Investigators say, less precise distance and speed, resulting in the spacecraft did not ship the robot to take effective measures in advance to avoid a collision. .</ P> <P> In addition, the investigators also found that, DART spacecraft at the target satellite in the process, consume too much fuel. .Because the navigation data is not precise enough, leading to excessive consumption of motor fuels, residual fuel has been insufficient to support their tasks. .Investigators also raised the problems the task management model, DART spacecraft design team lacks training and practical experience, in the absence of expert guidance, misjudged the complexity of this task. .</ P> <P> robot collision of the spacecraft and spy satellites, the orbit of the target satellite up a bit. .NASA said the spacecraft and the satellite position is not a threat to the safety of other satellites, once they re-enter the atmosphere and burn collapse will not cause harm. .</ P> <P> all robot control, the future may explore Mars, the Moon </ P> <P> It is reported that all spacecraft systems operated by the robot, it will pave the way for space autopilot computer. .This new technology can be controlled in the absence of a state of complete spacecraft and other spacecraft and docking of dialogue, but also to help people return to the moon, Mars, or toward the deeper universe. .</ P> <P> DART is NASA robotic spacecraft's Marshall Space Flight Center under the control of manufacturing technology companies from the United States track and weighing about 400 kg. .DART spacecraft's mission is to meet the Pentagon, an orbiting satellite and maneuver around the satellite, close and then leave. .</ P> <P> currently rely mainly on the U.S. space program astronauts operating the space shuttle in orbit, or repair the spacecraft. .If this 24-hour mission spacecraft was successfully tested, the future use of similar technology in future manned and unmanned space project basis, for example, can make use of unmanned spacecraft to the ISS and other goods. .</ P> </ p>.