... of measuring instruments are applied. 1. autonomous navigation system consisting at least of three angular velocity detectors, tree accelerometers and a specialized computer; 2. position-sensitive optical system working in complex with marked beacons ...
... Robert Goddard was a creative dreamer, whose vision of spaceflight first took shape as he sat among the branches of a cherry tree in 1899, at age 17. ...
... Without familiar objects to help them - trees, telephone poles, houses, and the like - it was almost impossible to judge sizes and distances and, during the drive home, Scott threw in the towel. ...