The Magellanic Cloud
Stanisław Lem
 The novel is set in the thirty-second century, in a communistic Utopian future. Humanity has colonized all of the Solar System, and is now making its first attempt at interstellar travel. Aboard a vessel called Gaia, 227 men and women leave the Earth for the Alpha Centauri system. After almost eight years of travel, they find signs of organic life on a planet orbiting Proxima Centauri, possibly originating on another planet within the Centauri system. One of the planets orbiting Alpha Centauri turns to be inhabited by an advanced civilization. The expedition meets a lifeless human ship of "Atlants", which turns out to be an old artificial war satellite of the USA and its NATO allies, carrying still active biological weapons and nuclear warheads, which had accidentally left Earth orbit and got lost in space during the Cold War era.