Word: planetful
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...manned trip to Mars, long the stuff of science fiction, now appears to be just a matter of time. The mystic planet, glowing red and ever brighter in the night skies, is heading toward its closest approach to the earth in 17 years this September, tantalizingly near and beckoning. After a hiatus of a dozen years, during which neither the U.S. nor the Soviet Union mounted missions to & Mars, a spacecraft is once again on its way, opening a new era in the exploration of the earth's closest planetary neighbor. During the next decade or so, the Soviets will...
...Mars mission early in the 21st century, the next President will have to make a commitment to a coherent national space policy sooner rather than later. Enormous problems remain to be solved, and two decades is precious little time for developing a program that would land humans on another planet. The clock is running, and to NASA Ames Scientist Carol Stoker, the message from the Soviets is coming across loud and clear: "We're going to Mars, and the bus is leaving." And like her, more and more Americans are asking: Will the U.S. be aboard...
Even as the celebration went on, the thoughts of space experts turned to future Mars odysseys. Scientists and engineers in both the U.S. and the Soviet Union are involved in the design of complex unmanned craft that will travel to the planet. Some American scientists are even conducting tests on a model of the robotic vehicle that may one day rove the Martian surface. Others are considering the ships that will carry human crews to Mars, the orbiting space station needed to launch them, the size and safety of the crews and the most practical routes through space. Though some...
...that it is unlikely to have been accidental," he notes. But other scientists question whether this can be attributed to the greenhouse effect. Stephen Schneider of the National Center for Atmospheric Research in Boulder agrees with Hansen that this has been the warmest decade on record and that the planet is gradually heating up. But the evidence, he says, is circumstantial. Contends Schneider: "It doesn't prove the greenhouse effect...
...earth science began in 1981, when scientists learned that planet-wide vibrations resulting from earthquakes deep within the earth are split into a complex system of overlapping "tones." The implication: there is something going on in the core that no one had previously suspected. Recalls John Woodhouse, a colleague of Dziewonski's at Harvard: "It was the beginning of a new wave of attention to the core...