Known Space is the fictional setting of about a dozen science fiction novels and several collections of short stories by American writer Larry Niven. It has also become a shared universe in the spin-off Man-Kzin Wars anthologies. The Internet Speculative Fiction Database (ISFDB) catalogs all works set in the fictional universe that includes Known Space under the series name Tales of Known Space, which was the title of a 1975 collection of Niven's short stories. The first-published work in the series, which was Niven's first published piece, was "The Coldest Place", in the December 1964 issue of If magazine, edited by Frederik Pohl. This was the first-published work in the 1975 collection.
Ringworld is a 1970 science fiction novel by Larry Niven, set in his Known Space universe and considered a classic of science fiction literature. Ringworld tells the story of Louis Wu and his companions on a mission to the Ringworld, an enormous rotating ring, an alien construct in space 186 million miles in diameter. Niven later wrote three sequel novels and then cowrote, with Edward M. Lerner, four prequels and a final sequel; the five latter novels constitute the Fleet of Worlds series. All the novels in the Ringworld series tie into numerous other books set in Known Space. Ringworld won the Nebula Award in 1970, as well as both the Hugo Award and Locus Award in 1971.
The Ringworld science fiction role-playing game was published by Chaosium in 1984, using the Basic Role-Playing system for its rules and Larry Niven's Ringworld novels as a setting.
The Kzinti are an alien cat-like species developed by Larry Niven in his Known Space series.
Pierson's Puppeteers, often known just as Puppeteers, are a fictional alien race from American author Larry Niven's Known Space books. The race first appeared in Niven’s novella Neutron Star.
Footfall is a 1985 science fiction novel by American writers Larry Niven and Jerry Pournelle. The book depicts the arrival of members of an alien species called the Fithp that have traveled to the Solar System from Alpha Centauri in a large spacecraft driven by a Bussard ramjet. Their intent is conquest of the planet Earth.
Pak Breeders and Pak Protectors are two developmental stages of fictional life in Larry Niven's Known Space universe. The Pak first appeared in "The Adults", which appeared in Galaxy in 1967; this story was expanded into the novel Protector by Larry Niven (1973). The Pak also appear in several of Niven's later novels, notably those set in the Ringworld.
An Alderson disk is a hypothetical artificial astronomical megastructure, like Larry Niven's Ringworld and the Dyson sphere. The disk is a giant platter with a thickness of several thousand miles. The Sun rests in the hole at the center of the disk. The outer perimeter of an Alderson disk would be roughly equivalent to the orbit of Mars or Jupiter. According to the proposal, a sufficiently large disk would have a larger mass than its Sun.
Inconstant Moon is a science fiction short story collection by American author Larry Niven that was published in 1973. "Inconstant Moon" is also a 1971 short story that is included in the collection. The title refers to "O, swear not by the moon, th' inconstant moon", a quote from the balcony scene in William Shakespeare's Romeo and Juliet. The collection was assembled from the US collections The Shape of Space and All the Myriad Ways.
A World Out of Time is a science fiction novel by Larry Niven published in 1976. It is set outside the Known Space universe of many of Niven's stories, but is otherwise fairly representative of his 1970s hard science fiction novels. The main part of the novel was originally serialized in Galaxy magazine as "Children of the State"; another part was originally published as the short story "Rammer". A World Out of Time placed fifth in the annual Locus Poll in 1977.
The V.C.s was a future war series that first appeared in the British science fiction comic 2000 AD No. 140 – 178 (1979–1980). Written by Gerry Finley-Day, the first episode was drawn by Mike McMahon who designed the craft and the main characters. The main series artists were Cam Kennedy, Garry Leach and John Richardson. Dan Abnett later the series at Book 5 with the help of artist Anthony Williams.
The Ringworld Engineers is a 1979 science fiction novel by American writer Larry Niven. It is the first sequel to Niven's Ringworld and was nominated for both the Hugo and Locus Awards in 1981.
The Man-Kzin Wars is a both the name of series of military science fiction anthologies as well as the name of the first book in the series. The short stories detail the eponymous conflicts between mankind and the Kzinti, set in Larry Niven's Known Space universe. However, Niven himself has written only a small number of the stories; most were written by other science fiction writers, as Niven opened this part of the Known Space to collaboration in the form of a shared universe. The cover art for the books in the series is created by Stephen Hickman.
World of Ptavvs is a science fiction novel by American writer Larry Niven, first published in 1966 and set in his Known Space universe. It was Niven's first published novel and is based on a 1965 magazine story of the same name.
Asteroids have appeared in fiction since at least the late 1800s, the first one—Ceres—having been discovered in 1801. They were initially only used infrequently as writers preferred the planets as settings. The once-popular Phaëton hypothesis, which states that the asteroid belt consists of the remnants of the former fifth planet that existed in an orbit between Mars and Jupiter before somehow being destroyed, has been a recurring theme with various explanations for the planet's destruction proposed. This hypothetical former planet is in science fiction often called "Bodia" in reference to Johann Elert Bode, for whom the since-discredited Titius–Bode law that predicts the planet's existence is named.
Fictional planets of the Solar System have been depicted since the 1700s—often but not always corresponding to hypothetical planets that have at one point or another been seriously proposed by real-world astronomers, though commonly persisting in fiction long after the underlying scientific theories have been refuted. Vulcan was a planet hypothesized to exist inside the orbit of Mercury between 1859 and 1915 to explain anomalies in Mercury's orbit until Einstein's theory of general relativity resolved the matter; it continued to appear in fiction as late as the 1960s. Counter-Earth—a planet diametrically opposite Earth in its orbit around the Sun—was originally proposed by the ancient Greek philosopher Philolaus in the fifth century BCE, and has appeared in fiction since at least the late 1800s. It is sometimes depicted as very similar to Earth and other times very different, often used as a vehicle for satire, and frequently inhabited by counterparts of the people of Earth.
The State is a fictional totalitarian world government in a future history that forms the back-story of three of Larry Niven's novels: A World Out of Time (1976), The Integral Trees (1984), and The Smoke Ring (1987). It is also the setting of two short stories, "Rammer" and "The Kiteman", as well as a stalled fourth novel, The Ghost Ships. After several years in development, Niven announced that The Ghost Ships would never be made and wrote The Ringworld Throne instead. The novel would have focused on a race of self-aware natural Bussard ramjets birthed in the supernova that created Levoy's Star and were returning to their place of birth to mate. According to Playgrounds of the Mind, Kendy and the kite-fliers from "The Kiteman" would have returned also.
