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Impact Poster
by REDINARDWhat is a NEO? Near-Earth-Objects (NEOs) are small bodies in the solar system (asteroids and short-period comets) with orbits that regularly bring them close to the Earth and which, therefore, are capable someday of striking our planet. Sometimes the term NEO is also used loosely to include all comets (not just short-period ones) that cross the Earth’s orbit. Those NEOs with orbits that actually intersect the Earth’s orbit are called Earth-Crossing-Objects (ECOs). David Morrison, January 2002
What is the risk of impacts? We don’t know when the next NEO impact will take place, but we can calculate the odds. Statistically, the greatest danger is from an NEO with about 1 million megatons energy (roughly 2 km in diameter). On average, one of these collides with the Earth once or twice per million years, producing a global catastrophe that would kill a substantial (but unknown) fraction of the Earth’s human population. Reduced to personal terms, this means that you have about one chance in 20,000 of dying as a result of a collision. Such statistics are interesting, but they don’t tell you, of course, when the next catastrophic impact will take place—next year or a million years from now. David Morrison, January 2002 http://impact.arc.nasa.gov/
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What is the risk of impacts? We don’t know when the next NEO impact will take place, but we can calculate the odds. Statistically, the greatest danger is from an NEO with about 1 million megatons energy (roughly 2 km in diameter). On average, one of these collides with the Earth once or twice per million years, producing a global catastrophe that would kill a substantial (but unknown) fraction of the Earth’s human population. Reduced to personal terms, this means that you have about one chance in 20,000 of dying as a result of a collision. Such statistics are interesting, but they don’t tell you, of course, when the next catastrophic impact will take place—next year or a million years from now. David Morrison, January 2002 http://impact.arc.nasa.gov/
created by
REDINARD (12/19/2002 12:19 PM)
What is the risk of impacts? We don’t know when the next NEO impact will take place, but we can calculate the odds. Statistically, the greatest danger is from an NEO with about 1 million megatons energy (roughly 2 km in diameter). On average, one of these collides with the Earth once or twice per million years, producing a global catastrophe that would kill a substantial (but unknown) fraction of the Earth’s human population. Reduced to personal terms, this means that you have about one chance in 20,000 of dying as a result of a collision. Such statistics are interesting, but they don’t tell you, of course, when the next catastrophic impact will take place—next year or a million years from now. David Morrison, January 2002 http://impact.arc.nasa.gov/
created by
REDINARD (12/19/2002 12:19 PM)
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Zazzle Prints
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Marketplace Category: Fantasy, Science Fiction > Science Fiction > Space > Asteroids, Comets, Meteors
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