Hard science fiction is a category of science fiction characterized by concern for scientific accuracy and logic. The term was first used in print in 1957 by P. Schuyler Miller in a review of John W. Campbell's Islands of Space in the November issue of Astounding Science Fiction. The complementary term soft science fiction, formed by analogy to hard science fiction, first appeared in the late 1970s. The term is formed by analogy to the popular distinction between the "hard" (natural) and "soft" (social) sciences, although there are examples generally considered as "hard" science fiction such as Isaac Asimov's Foundation series, built on mathematical sociology. Science fiction critic Gary Westfahl argues that neither term is part of a rigorous taxonomy; instead they are approximate ways of characterizing stories that reviewers and commentators have found useful.
Between Planets is a juvenile science fiction novel by American writer Robert A. Heinlein, originally serialized in Blue Book magazine in 1951 as "Planets in Combat". It was published in hardcover that year by Scribner's as part of the Heinlein juveniles.
Apocalyptic and post-apocalyptic fiction is a subgenre of science fiction in which the Earth's civilization is collapsing or has collapsed. The apocalypse event may be climatic, such as runaway climate change; astronomical, such as an impact event; destructive, such as nuclear holocaust or resource depletion; medical, such as a pandemic, whether natural or human-caused; end time, such as the Last Judgment, Second Coming or Ragnarök; or any other scenario in which the outcome is apocalyptic, such as a zombie apocalypse, cybernetic revolt, technological singularity, dysgenics or alien invasion.
Robert Lull Forward was an American physicist and science fiction writer. His literary work was noted for its scientific credibility and use of ideas developed from his career as an aerospace engineer. He also made important contributions to gravitational wave detection research.
The Voyage of the Space Beagle (1950) is a science fiction novel by Canadian-American writer A. E. van Vogt. An example of space opera subgenre, the novel is a "fix-up" compilation of four previously published stories:
The Smoke Ring is a 1987 science fiction novel by Larry Niven. Like much of Niven's work, the story is heavily influenced by the setting: a gas torus, a ring of air around a neutron star. It is a sequel to The Integral Trees.
"Neutron Star" is an English language science fiction short story by American writer Larry Niven. It was originally published in the October 1966 issue of Worlds of If. It was later reprinted in the collection of the same name and Crashlander. The story is set in Niven's fictional Known Space universe. It is notable for including a neutron star before their existence was widely known.
Femtotechnology is a term used in reference to the hypothetical manipulation of matter on the scale of a femtometer, or 10−15 m. This is three orders of magnitude lower than picotechnology, at the scale of 10−12 m, and six orders of magnitude lower than nanotechnology, at the scale of 10−9 m.
Subterranean fiction is a subgenre of adventure fiction, science fiction, or fantasy which focuses on fictional underground settings, sometimes at the center of the Earth or otherwise deep below the surface. The genre is based on, and has in turn influenced, the Hollow Earth theory. The earliest works in the genre were Enlightenment-era philosophical or allegorical works, in which the underground setting was often largely incidental. In the late 19th century, however, more pseudoscientific or proto-science-fictional motifs gained prevalence. Common themes have included a depiction of the underground world as more primitive than the surface, either culturally, technologically or biologically, or in some combination thereof. The former cases usually see the setting used as a venue for sword-and-sorcery fiction, while the latter often features cryptids or creatures extinct on the surface, such as dinosaurs or archaic humans. A less frequent theme has the underground world much more technologically advanced than the surface one, typically either as the refugium of a lost civilization, or as a secret base for space aliens.
Flux is a 1993 science fiction novel by British author Stephen Baxter. It is the third book in Baxter's Xeelee Sequence.
Non-Stop is a 1958 science fiction novel by British writer Brian Aldiss. It is about problems that the inhabitants of a huge generation space ship face after an alien amino acid that they picked up on another planet triggers a pandemic. Law and order began to collapse, and knowledge of the ship and of its purpose was eventually almost entirely lost throughout the vessel.
The Xeelee Sequence is a series of hard science fiction novels, novellas, and short stories written by British science fiction author Stephen Baxter. The series spans billions of years of fictional history, centering on humanity's future expansion into the universe, its intergalactic war with an enigmatic and supremely powerful Kardashev Type V alien civilization called the Xeelee, and the Xeelee's own cosmos-spanning war with dark matter entities called Photino Birds. The series features many other species and civilizations that play a prominent role, including the Squeem, the Qax, and the Silver Ghosts. Several stories in the Sequence also deal with humans and posthumans living in extreme conditions, such as at the heart of a neutron star (Flux), in a separate universe with considerably stronger gravity (Raft), and within eusocial hive societies (Coalescent).
Dragon's Egg is a 1980 hard science fiction novel by American writer Robert L. Forward. In the story, Dragon's Egg is a neutron star with a surface gravity 67 billion times that of Earth, and inhabited by cheela, intelligent creatures the size of a sesame seed who live, think and develop a million times faster than humans. Most of the novel, from May to June 2050, chronicles the cheela civilization beginning with its discovery of agriculture to advanced technology and its first face-to-face contact with humans, who are observing the hyper-rapid evolution of the cheela civilization from orbit around Dragon's Egg.
In science fiction and fantasy literatures, the term insectoid ("insect-like") denotes any fantastical fictional creature sharing physical or other traits with ordinary insects. Most frequently, insect-like or spider-like extraterrestrial life forms is meant; in such cases convergent evolution may presumably be responsible for the existence of such creatures. Occasionally, an earth-bound setting — such as in the film The Fly (1958), in which a scientist is accidentally transformed into a grotesque human–fly hybrid, or Kafka's famous novella The Metamorphosis (1915), which does not bother to explain how a man becomes an enormous insect — is the venue.
The planetary systems of stars other than the Sun and the Solar System are a staple element in many works of the science fiction genre.
Flashforward is a science fiction novel by Canadian author Robert J. Sawyer first published in 1999. The novel is set in 2009. At CERN, the Large Hadron Collider accelerator is performing a run to search for the Higgs boson. The experiment has a unique side effect; the entire human race loses their consciousness for about two minutes. During that time, nearly everyone sees themselves roughly twenty-one years and six months in the future. Each individual experiences the future through the senses of his or her future self. This "flashforward" results in countless deaths and accidents involving vehicles, aircraft, and any other device needing human control at the time of the experiment. The novel was adapted into the 2009 television series FlashForward.
Tatja Grimm's World is a 1987 science fiction novel by American author Vernor Vinge.
Evacuate Earth is a National Geographic Channel documentary that portrays the hypothetical scenario of humans evacuating the planet Earth before it is destroyed by a rogue neutron star. The documentary details the technical and social complications of building a generation ship to save humanity and other Earth organisms by relocating to a planet in another solar system.
Speculative evolution is a subgenre of science fiction and an artistic movement focused on hypothetical scenarios in the evolution of life, and a significant form of fictional biology. It is also known as speculative biology and it is referred to as speculative zoology in regards to hypothetical animals. Works incorporating speculative evolution may have entirely conceptual species that evolve on a planet other than Earth, or they may be an alternate history focused on an alternate evolution of terrestrial life. Speculative evolution is often considered hard science fiction because of its strong connection to and basis in science, particularly biology.
The habitability of neutron star systems is the potential of planets and moons orbiting a neutron star to provide suitable habitats for life.
