Word: pulsars
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Dates: during 1980-1989
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...pulsar was identified by through its X-ray pulses by Frederick D. Seward and Frank R. Harnden of the Center for Astrophysics and David Helfand of Columbia University...
Scientists theorize that some stars die in a violent explosion known as a supernova, which creates a pulsar-a very dense core of neutrons...
While radio waves and X-rays have determined that several hundred of these star remnants exist, scientists have only been able to locate three of them. Moreover, the recently located pulsar is easily observed...
When the scientists noticed that the radio pulses emitted by the pulsar were similar to one of the two earlier found pulsars, they began to hope that it too might be visible...
...next move was to contact astronomers at the Lawerence Berkeley Laboratory in California who employed specialzed telescopes to attempt to see the phenomenon. After three nights of observations they detected something unusual, but because the pulsar is visible only from the Southern Hempisphere they were unable to confirm its visibile existance until they moved to the 4-meter telescope at Cerro Tololo Observatory in Chilie...