"4 years at the speed of light and 7,400 years at ten times the speed of our current, fastest rockets, it will be a while before even Asimov can come up with a Land and Peoples of Alpha Centauri."
Asimov gives so patient and detailed a survey of the mapping of the heavens, the naming of stars, and (especially) the different ways of measuring their distance, size, and luminosity that Alpha Centauri becomes less the subject than a focusing point for a general astronomy lesson on the order of his younger "How Did We Find Out. . ." series.
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