Ijon Tichy is a fictional character who appears in several works of Stanisław Lem: The Futurological Congress, Peace on Earth, Observation on the Spot, The Star Diaries and Memoirs of a Space Traveller (more stories from The Star Diaries, issued in English translation as a separate volume).
Tichy is a space explorer whose interplanetary experiences are chronicled in The Star Diaries. He also moves in scientific circles on Earth; he is invited to the Futurological Congress in Costa Rica and his endorsement and approval are sought by a number of researchers and inventors on the edge of their field, such as Doctor Diagoras who has developed an artificial intelligence which is independent of mankind, and Decantor who has invented an immortal soul.
Tichy himself is the narrator in all the stories in which he appears. Sometimes he is the main protagonist; sometimes he merely serves to introduce some other character who has a story to tell. He is unmarried, usually well-meaning, accident-prone, and commendably honest about his failures, which include (thanks to another unfortunate experience with time) the entire Universe as we know it.
The Tichy stories are mostly comic or satirical, often exploring traditional science fiction themes, in a form that can be described as "Science Fiction Tall Tales". They are sometimes taken to deliberately ridiculous lengths, as in the episode of The Star Diaries where the unfortunate Tichy, caught in a time loop, is repeatedly banged on the head with a saucepan wielded by future versions of himself. In other stories Tichy meets alien civilisations whose detached perspective enables Lem to poke fun at humanity; on one of his voyages Tichy meets a priest whose colleague has been horrifically martyred by a thoroughly unselfish and well-intentioned race of aliens because he had told them that a martyr's death was one of the greatest things to which a Christian could aspire. Elsewhere Tichy meets a race of aliens (called "Indioci" in the Polish original, "Phools" in the English translation) who, desiring perfect harmony in their lives, entrust themselves to a machine which converts them into shiny discs to be arranged in pleasant patterns across their planet.
A genealogical sketch of Tichy family is given in Tychy's Star Diaries. Notable family members are as follows.
- Anonymus, the founder of the main Tichy family branch. He is surrounded by a mystery, including the origins of the surname. Some say it was Anonym's cognomen, arising from the fact he did not say a word during the trial on an accusation of eating his twin and in fact it should be "Cichy" ("quiet" in Polish) rather than Tichy, but the notary lisped... 
- Jeremiasz Tichy, grandfather of Ijon, famous of the fact that he "decided to create the General Theory of Everything, and nothing stopped him from doing this".
German TV series
On 26 March 2007, the German public television channel ZDF began broadcasting 15-minute episodes of Ijon Tichy: Raumpilot with Oliver Jahn as protagonist and Nora Tschirner as Analoge Halluzinelle. Employing CGI, the series portray Tichy travels e.g. in a "three-room rocket", which strongly resembles a French press on the outside, and a 1970s Berlin apartment on the inside. The TV adventures often deviate somewhat from those told in the Star Diaries, in part due to the tight 15-minute frame. The series was made available on internet in streaming video.
- McIrvin, Matt. "Star Diaries". VITRIFAX.
- Stanisław Lem, Star Diaries, "The Twenty-eighth Voyage"
- "Ijon Tichy", at Stanisław Lem's official website
- Krzysztof J. Kilian , "Sny o teoriach ostatecznych a problem przyszłości filozofii, ("Dreams about Ultimate Theories and the Problem of the Future of Phylosophy") ΣΟΦΙΑ, no. 8, 2008
- zdf.de Ijon Tichy: Raumpilot (German)
- "Serialowa adaptacja Lema w Berlinie", Gazeta.pl, 2007-02-14 (retrieved July 24, 2013)
- Ijon Tchy at Stanisław Lem's official site
- Ijon Tichy at the Internet Movie Database
- Ijon Tichy: Raumpilot streaming video site (German)