Science fantasy in the context of "New Wave science fiction"

The Voynich manuscript is an illustrated codex, hand-written in an unknown script referred to as Voynichese. The vellum on which it is written has been carbon-dated to the early 15th century (1404–1438). Stylistic analysis has indicated the manuscript may have been composed in Italy during the Italian Renaissance. The origins, authorship, and purpose of the manuscript are still debated, but currently scholars lack the translation(s) and context needed to either properly entertain or eliminate any of the possibilities. Hypotheses range from a script for a natural language or constructed language, an unreadable code, cypher, or other form of cryptography, or perhaps a hoax, reference work (i.e. folkloric index or compendium), glossolalia or work of fiction (e.g. science fantasy or mythopoeia, metafiction, speculative fiction).

The first confirmed owner was Georg Baresch, a 17th-century alchemist from Prague. The manuscript is named after Wilfrid Voynich, a Polish book dealer who purchased it in 1912. The manuscript consists of around 240 pages, but there is evidence that some of the pages are missing. The text is written from left to right, and some pages are foldable sheets of varying sizes. Most of the pages have fantastical illustrations and diagrams, some crudely coloured, with sections of the manuscript showing people, unidentified plants and astrological symbols. Since 1969, it has been held in Yale University's Beinecke Rare Book and Manuscript Library. In 2020, Yale University published the manuscript online in its entirety in their digital library.

Speculative fiction is an umbrella genre of fiction that encompasses all the subgenres that depart from realism, or strictly imitating everyday reality, instead presenting fantastical, supernatural, futuristic, or other highly imaginative realms or beings.

This catch-all genre includes, but is not limited to: fantasy, science fiction, science fantasy, superhero, paranormal and supernatural horror, alternate history, magical realism, slipstream, weird fiction, utopia and dystopia, apocalyptic and post-apocalyptic fiction. In other words, the genre presents individuals, events, or places beyond the ordinary real world.

Superhero fiction is a subgenre of speculative fiction showcasing the adventures of costumed crime-fighters known as superheroes, who often possess superhuman powers and battle similarly powered criminals known as supervillains. The genre primarily falls between hard fantasy and soft science fiction in the spectrum of scientific realism, often merging into science fantasy. It is most commonly associated with comic books, though it has expanded into other media through adaptations and original works.

There have been many attempts at defining science fiction. This is a list of definitions that have been offered by authors, editors, critics and fans over the years since science fiction became a genre. Definitions of related terms such as "science fantasy", "speculative fiction", and "fabulation" are included where they are intended as definitions of aspects of science fiction or because they illuminate related definitions—see e.g. Robert Scholes's definitions of "fabulation" and "structural fabulation" below. Some definitions of sub-types of science fiction are included, too; for example see David Ketterer's definition of "philosophically-oriented science fiction". In addition, some definitions are included that define, for example, a science fiction story, rather than science fiction itself, since these also illuminate an underlying definition of science fiction.

The Encyclopedia of Science Fiction, edited by John Clute and Peter Nicholls, contains an extensive discussion of the problem of definition, under the heading "Definitions of SF". The authors regard Darko Suvin's definition as having been most useful in catalysing academic debate, though they consider disagreements to be inevitable as science fiction is not homogeneous. Suvin's cited definition, dating from 1972, is: "a literary genre whose necessary and sufficient conditions are the presence and interaction of estrangement and cognition, and whose main formal device is an imaginative framework alternative to the author's empirical environment". The authors of the Encyclopedia article—Brian Stableford, Clute, and Nicholls—explain that, by "cognition", Suvin refers to the seeking of rational understanding, while his concept of estrangement is similar to the idea of alienation developed by Bertolt Brecht, that is, a means of making the subject matter recognizable while also seeming unfamiliar.

A Wrinkle in Time is a young adult science fantasy novel written by American author Madeleine L'Engle. First published in 1962, the book won the Newbery Medal, the Sequoyah Book Award and the Lewis Carroll Shelf Award, and was runner-up for the Hans Christian Andersen Award. The main characters – Meg Murry, Charles Wallace Murry, and Calvin O'Keefe – embark on a journey through space and time, from galaxy to galaxy, as they endeavor to rescue the Murrys' father and fight The Black Thing that has intruded into several worlds.

The novel offers a glimpse into the war between light and darkness, and good and evil, as the young characters mature into adolescents on their journey, and wrestles with questions of spirituality and purpose, as the characters are often thrown into conflicts of love, divinity, and goodness. It is the first book in L'Engle's Time Quintet, which follows the Murry and O'Keefe families.

A Wind in the Door is a young adult science fantasy novel by American author Madeleine L'Engle. It is a companion book to A Wrinkle in Time and part of the Time Quintet.

Planetary romance (other synonyms are sword and planet, and planetary adventure) is a subgenre of science fiction or science fantasy in which the bulk of the action consists of adventures on one or more exotic alien planets, characterized by distinctive physical and cultural backgrounds. Some planetary romances take place against the background of a future culture where travel between worlds by spaceship is commonplace; others, particularly the earliest examples of the genre, do not, invoking flying carpets, astral projection, or other methods of getting between planets. In either case, it is the planetside adventures that are the focus of the story, not the mode of travel.

A significant precursor of the genre is Edwin L. Arnold's Lieut. Gullivar Jones: His Vacation (1905).

Galactic empires are a science fiction setting trope, in which most or all of the habitable planets in the setting's galaxy are ruled by a single centralized political entity. Galactic empires most frequently appear in works in the sub-genres of science fantasy and space opera, although they may appear in other sub-genres as well. Works featuring galactic empires may have them as the story's focus, chronicling the empire's growth and/or decline. Alternatively, they may merely serve as a backdrop against which the events of the story play out.

Science fiction comedy (sci-fi comedy) or comic science fiction is a subgenre of science fiction or science fantasy that exploits the science fiction genre's conventions for comedic effect. The genre often mocks or satirizes standard science fiction conventions, concepts and tropes – such as alien invasion of Earth, interstellar travel, or futuristic technology. It can also satirize and criticize present-day society.

An early example was the Pete Manx series by Henry Kuttner and Arthur K. Barnes (sometimes writing together and sometimes separately, under the house pen-name of Kelvin Kent). Published in Thrilling Wonder Stories in the late 1930s and early 1940s, the series featured a time-traveling carnival barker who uses his con-man abilities to get out of trouble. Two later series cemented Kuttner's reputation as one of the most popular early writers of comic science fiction: the Gallegher series (about a drunken inventor and his narcissistic robot) and the Hogben series (about a family of mutant hillbillies). The former appeared in Astounding Science Fiction in 1943 and 1948 and was collected in hardcover as Robots Have No Tails (Gnome, 1952), and the latter appeared in Thrilling Wonder Stories in the late 1940s.