Word: orbital
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Dates: during 1990-1999
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...goes according to plan, the competition winners, each weighing 500 kg (1,100 lbs.) or less, will be launched by rocket into Earth orbit. There, high above the atmosphere, each will unfurl a giant sail consisting of wispy plastic coated with a film of aluminum. Positioned by radio signals from the ground, the sails will catch the gentle push of sunlight...
...hole at the center of a galaxy. At least 40% of the experiments planned for the telescope will have to be postponed until engineers can make lenses for the craft's instruments that will compensate for the mirror's flaw. Astronauts will then have to ride the shuttle into orbit and space walk to the telescope, where they will fit the new lenses. And getting those spectacles to Hubble may take three to six years...
...Quebec's status uncertain. Now the country must rethink what form of government will take the 123-year-old confederation into the next century. -- An interview with Quebec's Premier Robert Bourassa. -- Can the outpouring of international relief assistance to earthquake victims bring the maverick Iran back into the orbit of nations...
...scientists assume that the uranium-thorium tests were right and the carbon 14 tests wrong? For one thing, the carbon datings pointed to the strange conclusion that ice ages, thought to be related to changes in the earth's orbit around the sun, have mysteriously lagged behind those changes by a few thousand years. But uranium-thorium dating shows no such lag. Moreover, carbon 14 levels in the air -- and thus the amount ingested by organisms -- are known to vary over time, and that can affect the results of carbon dating...
Independent since 1967, the People's Democratic Republic of Yemen has spent the past 20 years in the Soviet orbit. The withdrawal of Soviet aid, plus the collapse of communism in Eastern Europe, led South Yemen to accept an offer to unite with the Yemen Arab Republic, its northern neighbor...