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[T]hus... any intelligent species would develop at least the rocket technology capable of... a travel velocity v<sub>es</sub> of 3 x 10<sup>-4</sup>c… - Frank J. Tipler
" "[T]hus... any intelligent species would develop at least the rocket technology capable of... a travel velocity v<sub>es</sub> of 3 x 10<sup>-4</sup>c. At this velocity the travel time to the nearest stars would be between 10<sup>4</sup> and 10<sup>5</sup> years. This... would necessitate... self-repair capacity... Nuclear power-souces would supply the power... If power utilization during the free-fall period was... low, even chemical reactions could supply the power.
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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 basic idea... is straightforward and... has led other authors, such as Fermi... Dyson... Hart... Simpson... and Kuiper & Morris... to conclude that extraterrestrial beings do not exist: if they did exist and possessed the technology for interstellar communication, they would also have developed interstellar travel and thus would already be present in our solar system.
The factors <math>f_lf_if_c</math> should not depend strongly on the evolution of the Galaxy... and so can be regarded as constants. Since the Galaxy is between 11 and 18 billion years old, the number N of stars older than 5.3 billion years is about twice the number of stars formed after the Sun, and thus approximately equal to the number of stars in the Galaxy, 10<sup>11</sup>. Thus <math>p \leqslant 10^{-11}</math>. If we accept the usual values of <math>f_p=0.1</math> to 1 and <math>n_e = 1</math> found in most discussions... then <math>f_lf_if_c \leqslant 10^{-10}</math>. The number of communicating civilizations now existing in our Galaxy is less than or equal to <math>p</math> x (number of stars in galaxy) = 1; that is to say, us.
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