asteroid impact
Asteroid impact
The solar system is filled with a barrage of comets and asteroids. Some of these cross the paths of the other planets as well as the earth’s. The earth travels around in a swarm of projectiles. Comets and asteroids can and do strike the surface of the earth. Evidence from spacecraft exploring the outer planets and their satellites reveal the presence of craters scaring their surfaces. These help to support the idea …
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…carry out a deliberate, comprehensive survey with ample time to react if any threatening NEO is found. In contrast, however, the warning time for impact from a long-period comet might be as short as two years, requiring a different class of response.
Bibliography
National Geographic Video, Asteroids Deadly impact, 1997
K. C. Cole, The Hole in the Universe, New York 2001
Dr. E. C. Krupp, Echoes of the Ancient Skies, New York 1983
Merit Student Encyclopedia, New York 1980
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