Word: cargoing
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...hours later, Americans had more good news from space as they watched the televised deployment from Discovery's cargo bay of the $100 million Tracking and Data Relay Satellite. And so, on the first day of its scheduled four-day mission, the five-man Discovery crew achieved one of its major goals -- sending TDRS toward its designated orbit -- and seemed well on its way toward the other: a successful test flight of the newly refurbished shuttle. Discovery's leap into space seemed at last to have given the nation, as well as NASA, a long-needed catharsis, purging...
...Since the drought has made the Mississippi more hazardous for some vessels, many shippers have turned to the Tenn-Tom, still easily navigable. Says Joe Pyne, president of Houston-based Dixie Carriers: "Without it, some companies would have shut down." In July the waterway carried 2 million tons of cargo, the first time that mark was reached in a single month. So far this year, 5.8 million tons have been hauled, vs. 4 million tons...
Soon after the test firing, shuttle managers expect to give the go-ahead to a plan for engineers to cut a hole through the rear wall of Discovery's cargo bay in an effort to reach and repair a nitrogen tetroxide leak...
...that speed, the astronauts would have a much smaller "window" for re-entering the atmosphere. "Come in too low, and you burn up," says Oberg. "Come in too high, and you overshoot. You miss the earth, and you'll never see it again." Other plans call for an unmanned cargo ship to precede the manned craft to Mars and for even higher velocities that would cut mission times down to a year...
...problems of sending a spacecraft to Mars and bringing it back to earth pale when compared with the challenge of keeping its human cargo safe and in peak physical and mental condition. The medical consequences of long periods of weightlessness are still not fully understood. And radiation, says NASA's Michael Bungo, "is going to be a showstopper." Once beyond the earth's atmosphere and magnetic field, which protects terrestrial life from most lethal radiation, crew members would be vulnerable to cosmic rays. These highly energetic particles travel through space at close to the speed of light and can produce...