Word: null
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Dates: during 1990-1999
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...NASA committee investigating the defect that has crippled the $1.5 billion telescope announced yesterday that the millimeter mistake was found while testing the measuring device, called a null corrector...
...investigation committee said in a one-page statement that it found the millimeter error while testing a null corrector on Wednesday at the Hughes Danbury Optical Systems plant in Danbury, Conn., where the mirrors were made...
Hughes Danbury had preserved the null corrector in the exact position that had been used to grind and polish the mirrors in the early 1980s...
Preliminary results of the test, the statement said, "have revealed a clear discrepancy of approximately one millimeter between the design of the null corrector and the device as it exists...
...senior military officer in Moscow said no offer of amnesty had been authorized and criminal cases had been opened against all deserters. While Mikhail Gorbachev had not cracked down on the nationalist movement, Sajudis, or the separatist parliament, his power play had rendered Lithuania's declaration of independence null and void...