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- SCIENCE, Page 81Cosmic Birth
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- First look at a young pulsar
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- Scientists have been able only to theorize about the origin
- of pulsars, those superdense, fast-spinning celestial objects
- that appear to blink on and off as often as every millisecond.
- Now the mystery seems to be solved. Last week an international
- team of astronomers announced that they had detected a pulsar
- emerging from the murky dust clouds left over from Supernova
- 1987A, a giant star that exploded about 170,000 light-years
- from earth and was first seen two years ago.
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- Astronomers have long believed that pulsars are produced by
- stellar explosions. Until now, though, no pulsar had been
- observed so soon after its birth. The first pulsar was
- discovered in 1967, its radio signals so regular that they were
- suspected of coming from an alien civilization. Several hundred
- pulsars have since been found.
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- Because the new pulsar is so young, it is spinning almost
- unimaginably fast. Its "day" is only one two-thousandth of a
- second long, and while the earth's equator rotates at about
- 1,000 m.p.h., the pulsar's is moving at more than 200 million
- m.p.h. By rights, the pulsar should fly apart, but it is so
- dense -- a teaspoon of it would weigh 300,000 tons on earth --
- that its gravity holds it together. Says Richard Muller of
- Lawrence Berkeley Laboratory, a member of the discovery team:
- "We can't help being astounded by what we are seeing."
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- Other astronomers are cautious about the find, since it is
- based on only a single unconfirmed observation. But if it holds
- up, says theorist Stan Woosley of the University of California
- at Santa Cruz, "it will be a whole new laboratory for doing
- physics. It will be marvelous."
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