Word: radioing
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Dates: during 1960-1969
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...works well only within a three-mile radius of the transmitter. Sky-wave jamming, the second technique, calls for transmission from a point as far away as the source of the outside signal. This requires expensive tower construction in remote areas and constant monitoring of the ionosphere, off which radio waves are bounced from sender to receiver...
After Cambridge University astronomers announced the discovery of pulsars last February, scientists conjured up widely differing theories about the nature of the mysterious radio sources. There was unanimity about only one point: pulsars beeped with clocklike regularity. The pulses from space seemed so precisely timed that some scientists advocated their use as a universal time standard more accurate than even an atomic clock. Others suggested that the signals could provide a reliable timing device for astronauts on distant missions or for experimental checks on the theory of relativity. Now new discoveries have undermined these imaginative plans: pulsars, like clocks that...
...first inkling that pulsars might not be reliable timepieces came after Cornell University astronomers at Arecibo, Puerto Rico, trained their 1,000-ft. radio telescope on a newly discovered pulsar in the Crab Nebula, the glowing remnant of a supernova-or stellar explosion-that was seen from earth in A.D. 1054. Unlike most other pulsars, which have relatively low repetition rates (between one and four per second), the new find was ticking about 30 times per second. Carefully measuring the pulse rate in October and then again in November, the astronomers found that it was slowing down by about...
...neutron star has an in credibly intense magnetic field that traps ionized gases expelled from the supernova. As the star and its magnetic field spin, the outmost of the trapped gases are whirled at almost the speed of light until they break away, producing an intense beam of radio waves-the regularly spaced pulses. At the same time, Gold theorizes, the ionized gases exert a drag on the magnetic field, and thus on the star itself, gradually slowing its rate of spin...
This week West Berlin's Singakade-mie performs the Christmas oratorio with members of the Radio Symphony Orchestra. In London, Composer Benjamin Britten conducts three cantatas for the BBC from St. Andrew's Church in Holborn. In Manhattan, Violinist and Conductor Alexander Schneider completes a two-concert series of cantatas and concertos at Carnegie Hall. And in New York, as in other major capitals, the coming weeks will see a performance of Bach's undoubted masterpiece, the B-Minor Mass-a work that he began as a tribute to the Catholic King of Poland, but which...