Structural engineers and repair crews have done all that they can but the end result is as we feared: the Arecibo radio telescope has to come down. The venerable space observatory has been out of commission since August when a cable atop Tower 4, which supports the platform, snapped and gutted a 100-foot long section from the telescope’s reflecting dish. At the time, the University of Florida, which runs the facility on behalf of the National Science Foundation, deployed three different engineering teams to investigate the problem.