The novel is set in a communist utopian future in the 32nd century. Humanity has colonized the entire solar system and is now trying for the first time to travel to another solar system.
227 men and women, including the protagonist, gather on the spaceship Gea to travel to the Alpha Centauri system . The journey takes many years and is psychologically stressful for the astronauts.
On the way, the astronauts stumbled upon an ancient relic of the Cold War: a NATO spaceship equipped with weapons of mass destruction that fell victim to an accident and has been drifting through space for centuries.
On a planet in the Proxima Centauri system , the expedition discovers traces of organic life and the protagonist stays on site to investigate them while the Gea flies on to search for the origin of this life. The protagonist then learns via radio that the ship has made contact with an advanced civilization in the Alpha Centauri system .
Censorship and criticism
When the novel was first published, parts of it were censored. Lem criticized the censored version, calling it an overly optimistic representation of communism. A full version was not published until the 1990s.