Ark 47 Libra" is written in the genre of ultra-hard science fiction. The rigor of the scientific framework to which the author adhered is demonstrated by the passage: "Here the author is forced to interrupt the conversation and interject with his own comment, since some readers may not understand the problems being discussed. The fact is that many readers were brought up on science fiction, in the form of books, films and TV series, where heroes fly from star to star in a matter of seconds on various bizarrely shaped structures, casting scientific spells. Consciously or unwillingly, the reader gets the impression that sooner or later technological progress will make manned interstellar flights possible, if not in seconds, but at least in years. He won't! Manned flights between nearby stars, while possible purely speculatively (and then only with a number of wild assumptions), are just as impossible in practice as a supersonic city taxi. Manned flights over distances of tens of light years are realistic only if the pilots live for many thousands of years. The limitation on the speed of movement is a law of nature, having approximately the same status as the one that does not allow you to pull yourself out of the swamp by your hair." But despite all the restrictions, humanity is attempting to colonize a dead exoplanet 60 light years from Earth...< /p>