Extraterrestrial civilization

Definition and stakes

| override_editor,  Advanced Automation for Space Missions… (1980)

“ Figure 5.27 - Population of extraterrestrial civilizations as a function of galactic time. If we do in fact find such machines and are able to interrogate them successfully, we may become privy to the doings of incredibly old alien societies long since perished. These societies may lead to many others, so we may be treated, not just to a marvelous description of the entire biology and history of a single intelligent race, but also to an encyclopedic travelogue describing thousands or millions of other extraterrestrial civilizations known to the creators of the probe we are examining. ”
Source: Wikisource

Portrait of Poul Anderson Poul Anderson,  Gypsy (1950 <!-- | portal)

“ Those who wearied of it could always colonize a planet, we would be spreading mankind over the Galaxy. When our descendants were many, they would build other ships until there was a fleet, a mobile city hurtling from sun to sun. It would be a culture to itself, drawing on the best which all races had to offer and spreading it over the worlds. It would be the bloodstream of the interstellar civilization which was slowly gestating in the universe. ”
Source: Wikisource

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