If the Universe Is Teeming with Aliens ... WHERE IS by Stephen Webb

By Stephen Webb

In a 1950 dialog at Los Alamos, 4 world-class scientists in most cases agreed, given the dimensions of the Universe, that complicated extraterrestrial civilizations has to be current. yet one of many 4, Enrico Fermi, requested, "If those civilizations do exist, the place is everybody?" Given the truth that there are probably four hundred million stars in our Galaxy by myself, and maybe four hundred million galaxies within the Universe, it stands to cause that someplace available in the market, within the 14 billion-year-old cosmos, there's or as soon as was once a civilization not less than as complex as our personal. Webb discusses intimately the 50 such a lot cogent and exciting options to Fermi's recognized paradox.

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Extra info for If the Universe Is Teeming with Aliens ... WHERE IS EVERYBODY?: Fifty Solutions to the Fermi Paradox and the Problem of Extraterrestrial Life

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In England, for example, UFOs have been blamed for the crop circle phenomenon. At least some, and maybe all, of the crop circles are man-made. In a recent case, a self-confessed maker of crop circles got into trouble with the law. He made a 7-pointed shape after hearing an “expert” claim that elaborately designed crop circles were impossible for man to make. ) Complex designs had been documented, so this was proof — according to the expert — that at least some crop circles were extraterrestrial in origin.

34 No great attention was paid to the phenomenon until the lights acquired a catchy name. Call them “flying saucers” and suddenly everyone is interested. ” On 24 June 1947, Kenneth Arnold was flying his private plane over the Cascade Mountain range in Washington State. ” The name stuck. The press was hungry for gossip about these “flying saucers,” and the term found resonance with an American public nervously entering the 29 Chapter 3 Cold War. 35 If flying saucers are real, if they are indeed spacecraft crewed by aliens, then the Fermi paradox is instantly resolved.

FIGURE 12 The five Lagrangian points are places in the vicinity of two orbiting masses where a third smaller body can maintain a fixed distance from the larger masses. The points L1, L2 and L3, which lie on a line connecting the two large masses, are unstable: after a perturbation, the small body will move away from the Lagrangian point. Under certain circumstances, the points L4 and L5 are stable: after a perturbation, the small body will return to the Lagrangian point. The L4 and L5 points are stable for the Earth–Moon system, so they are a good place to park probes for long-term study of the Earth.

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