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Impact!: the Threat of Comets and Asteroids

by Verschuur, Gerrit L.

  • ISBN: 9780195101058
  • ISBN10: 0195101057

Impact!: the Threat of Comets and Asteroids

by Verschuur, Gerrit L.

  • List Price: $30.00
  • Binding: Hardcover
  • Publisher: Oxford University Press
  • Publish date: 01/01/2009
  • ISBN: 9780195101058
  • ISBN10: 0195101057
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Description: In Impact, Gerrit L. Verschuur offers an eye-opening look at catastrophic collisions with our planet. Perhaps more important, he paints an unsettling portrait of the possibility of new collisions with earth, exploring potential threats to our planet and describing what scientists are doing right now to prepare for this awful possibility. Every day something from space hits our planet, Verschuur reveals. In fact, about 10,000 tons of space debris fall to earth every year, mostly in meteoric form. But meteors are not the greatest threat to life on earth, the author points out. The major threats are asteroids and comets. The reader discovers that astronomers have located some 350 NEAs ("Near Earth Asteroids"), objects whose orbits cross the orbit of the earth, the largest of which are 1627 Ivar (6 kilometers wide) and 1580 Betula (8 kilometers). Comets, of course, are even more deadly. Verschuur provides a gripping description of the small comet that exploded in the atmosphere above the Tunguska River valley in Siberia, in 1908, in a blinding flash visible for several thousand miles (every tree within sixty miles of ground zero was flattened). In addition, the author describes the efforts of Spacewatch and other groups to locate NEAs, and evaluates the idea that comet and asteroid impacts have been an underrated factor in the evolution of life on earth.
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1996 1st edition in VG condition. Ex-Library with the usual artifacts however
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8vo, 237 pp.
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0195101057. A tight copy. Edges of covers are lightly rubbed. Signed and inscribed by author on title page.; 1.2 x 9.4 x 6.1 Inches; 256 pages; Signed by Author.
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0195101057 237pp including bibliography, name index, and subject index
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0195101057 237pp including bibliography, name index, and subject index
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