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发帖数: 298 | 1 By Robert Roy Britt
Senior Science Writer
posted: 07:00 am ET
18 June 2002
ALBUQUERQUE, N.M. - On June 18, 1962, a rocket outfitted with a Geiger counter
soared above Earth and collected about five minutes worth of rather primitive
data, nonetheless discovering the first source of X-rays outside our solar
system, an object called Scorpius X-1.
Forty years later, astronomers are blessed with four space-based X-ray
observatories. Unlike a simple Geiger counter, these powerful instruments
"see" lik |
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