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[T]he problem of interstellar travel has been reduced to... transporting a von Neumann machine to another stellar system. This can be done even with … - Frank J. Tipler
" "[T]he problem of interstellar travel has been reduced to... transporting a von Neumann machine to another stellar system. This can be done even with present-day rocket technology.
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About Frank J. Tipler
(born February 1, 1947) is an American mathematical physicist and cosmologist, holding a joint appointment in the Departments of Mathematics and Physics at Tulane University. Tipler has written books and papers on the based on Pierre Teilhard de Chardin's religious ideas, which he claims is a mechanism for the resurrection of the dead. He is also known for his theories on the (Tipler time machine) and for the , an argument that no intelligent life exists outside of the Solar System. His work has attracted criticism, notably from systems theorist George F. R. Ellis who has argued that his theories are largely pseudoscience.
Also Known As
Native Name:
Frank Jennings Tipler III
Alternative Names:
Frank Jennings Tipler
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Additional quotes by Frank J. Tipler
The problem with the Drake equation is that only <math>f_p</math>—and to a lesser degree <math>n_e</math>— is subject to experimental determination... [O]ne must have a fairly large sample; for <math>f_l</math>, <math>f_i</math>, and <math>f_c</math> we have only... the Earth. However, if... any intelligent species... will begin... galactic exploration within 100 years after developing... interstellar communication... the sample size is enlarged... Since <math>f_p</math>—and <math>n_e</math> can... be determined by direct astrophysical measurement, the fact that extraterrestrial intelligent beings are not present in our solar system permits us to obtain a direct astrophysical measurement of an upper bound to... <math>f_lf_if_c</math>, which depends only on biological and sociological factors.
[M]aterials [to reproduce the von Neumann machine] should be available in virtually any stellar system—including systems—in the form of meteors, asteroids, comets, and other debris from the formation of the stellar system. ...[M]aterial in asteroids are highly differentiatied; many... are largely nickel-iron, while others contain large amounts of hydrocarbons.
Hunter has pointed out that by using a Jupiter swingby to approach the Sun and then giving a velocity boost at perihelion, a solar system escape velocity... is possible with present-day chemical rockets... [M]ost other stars should have planets (or companion stars) with characteristics sufficiently close to... the Jupiter-Sun system to use this launch strategy in reverse to slow down in the other solar system.
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