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- <text id=93TT1203>
- <title>
- Mar. 22, 1993: Faster Than a Speeding Bullet
- </title>
- <history>
- TIME--The Weekly Newsmagazine--1993
- Mar. 22, 1993 Can Animals Think
- </history>
- <article>
- <source>Time Magazine</source>
- <hdr>
- SCIENCE, Page 63
- Faster Than a Speeding Bullet
- </hdr>
- <body>
- <p> Unlike the wandering planets, the stars appear to be fixed in
- the sky. Astronomers know, though, that this is only an
- illusion. The stars are moving too, floating lazily through
- space. At least, most of them are floating: careful observations
- from a land-based telescope of a star known as PSR 2224+65, in
- the constellation Cepheus, have revealed that this particular
- object is virtually shooting through the galaxy. Now 6,000
- light-years from Earth and zipping along at more than 2 million
- m.p.h., it is going 10 times as fast as the speediest star ever
- seen, and 100 times as fast as most stars. At this rate, it will
- almost certainly escape the Milky Way altogether.
- </p>
- <p> Not that PSR 2224+65 is in any sense an ordinary star. It
- is a pulsar, the superdense ash left behind when a star
- exploded--about a million years ago--in the phenomenon known
- as a supernova. The blast blew off the star's outer layers and
- flung the 3,000 trillion trillion ton, Manhattan-size pulsar
- through space. The dead star generates an enormous magnetic
- field, which in turn sends out powerful radio pulses (hence the
- name pulsar).
- </p>
- <p> It also emits radiation that plows through the sparse
- gases of interstellar space. The radiation, says Cornell
- astronomer James Cordes, who co-authored a report on the pulsar
- in this week's Nature, "creates a wake, like a boat going across
- a choppy lake." Seeing how the wake, which appears to be shaped
- roughly like a guitar, interacts with other matter will help
- scientists understand what lies in the spaces between the stars.
- The very existence of one high-velocity pulsar implies that
- there must be others, some of which have undoubtedly escaped
- into deep space. Scientists hope to use the Hubble telescope to
- spot and study more superfast pulsars--if NASA's mission to
- fix the hobbled instrument succeeds.
- </p>
-
- </body>
- </article>
- </text>
-
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