Word: spacecrafts
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...crashing comet, wayward black hole or alien spacecraft level the forest around Tunguska, Siberia, in 1908? None of the above. A computer model by NASA scientists revealed that the likely culprit was a stony asteroid -- 30 m (100 ft.) in diameter -- that exploded...
...solar system (and perhaps beyond) would be done by robot probes smaller and smarter than those of today. Advances in computer technology and genetic engineering, predicts physicist Freeman Dyson of the Institute for Advanced Study in Princeton, New Jersey, will enable scientists to squeeze the capabilities of a Voyager spacecraft, say, into a 2-lb. package that is half machine, half organism. This he dubs the astrochicken. Launched as an "egg," the astrochicken would sprout solar-panel wings that would double as radio antennae during flight. Arriving at its destination, the craft would nibble on the ice in planetary rings...
...stretching the copper-cored, shoelace-thin tether within the earth's magnetic field, NASA scientists expected to generate up to 5,000 volts of electricity. Ultimately, such tethers could not only power spacecraft but also secure counterweights that could be set spinning to create artificial gravity...
Stone was a NASA staff scientist who was chiefscientist for the Voyager project since 1972. NASAsent two Voyager unmanned spacecraft into space.The vehicles have sent pictures form Uranus andNeptune and discovered several new moons in thesolar system...
While NASA studied Magellan's images, another space explorer made history last week. Moving out beyond Mars, Galileo became the first spacecraft to have a close encounter with an asteroid. But pictures of the mysterious planetary fragment, called Gaspra, are unavailable because Galileo's main antenna for sending out images is frozen in the wrong position. Not until 1992, when Galileo swings back by Earth, can smaller antennas on the craft successfully transmit the missing pictures. The frustrating delay makes scientists all the more grateful for Magellan's reliable -- and revealing -- signals from Venus...