A natural satellite is, in the most common usage, an astronomical body that orbits a planet, dwarf planet, or small Solar System body. Natural satellites are colloquially referred to as moons, a derivation from the Moon of Earth.
The Three Laws of Robotics are a set of rules devised by science fiction author Isaac Asimov, which were to be followed by robots in several of his stories. The rules were introduced in his 1942 short story "Runaround", although similar restrictions had been implied in earlier stories.
Iapetus is the outermost of Saturn's large moons. With an estimated diameter of 1,469 km, it is the third-largest moon of Saturn and the eleventh-largest in the Solar System. Named after the Titan Iapetus, the moon was discovered in 1671 by Giovanni Domenico Cassini.
Mimas, also designated Saturn I, is the seventh-largest natural satellite of Saturn. With a mean diameter of 396.4 kilometres or 246.3 miles, Mimas is the smallest astronomical body known to be roughly rounded in shape due to its own gravity. Mimas's low density, 1.15 g/cm3, indicates that it is composed mostly of water ice with only a small amount of rock, and study of Mimas's motion suggests that it may have a liquid ocean beneath its surface ice. The surface of Mimas is heavily cratered and shows little signs of recent geological activity. A notable feature of Mimas's surface is Herschel, one of the largest craters relative to the size of the parent body in the Solar System. Herschel measures 139 kilometres across, about one-third of Mimas's mean diameter, and formed from an extremely energetic impact event. The crater's name is derived from the discoverer of Mimas, William Herschel, in 1789. The moon's presence has created one of the largest 'gaps' in Saturn's ring, named the Cassini Division, due to orbital resonance destabilizing the particles' orbit there.
This is a bibliography of the books written or edited by Isaac Asimov, arranged alphabetically. Asimov was a prolific author, and he engaged in many collaborations with other authors. This list may not yet be complete. The total number of books listed here is over 500. Asimov died in 1992 at age 72; a small number of his books were published posthumously.
The moons of Saturn are numerous and diverse, ranging from tiny moonlets only tens of meters across to the enormous Titan, which is larger than the planet Mercury. There are 146 moons with confirmed orbits, the most of any planet in the solar system. This number does not include the many thousands of moonlets embedded within Saturn's dense rings, nor hundreds of possible kilometer-sized distant moons that were seen through telescopes but not recaptured. Seven Saturnian moons are large enough to have collapsed into a relaxed, ellipsoidal shape, though only one or two of those, Titan and possibly Rhea, are currently in hydrostatic equilibrium. Three moons are particularly notable. Titan is the second-largest moon in the Solar System, with a nitrogen-rich Earth-like atmosphere and a landscape featuring river networks and hydrocarbon lakes. Enceladus emits jets of ice from its south-polar region and is covered in a deep layer of snow. Iapetus has contrasting black and white hemispheres as well as an extensive ridge of equatorial mountains among the tallest in the solar system.
The naming of moons has been the responsibility of the International Astronomical Union's committee for Planetary System Nomenclature since 1973. That committee is known today as the Working Group for Planetary System Nomenclature (WGPSN).
This is a bibliography of books by Isaac Asimov organized by series chronologically and by series timeline.
David Starr, Space Ranger is the first novel in the Lucky Starr series, six juvenile science fiction novels by Isaac Asimov that originally appeared under the pseudonym Paul French. The novel was written between 10 June and 29 July 1951 and first published by Doubleday & Company in January 1952. Since 1971, reprints have included an introduction by Asimov explaining that advancing knowledge of conditions on Mars have rendered some of the novel's descriptions of that world inaccurate. The novel was originally intended to serve as the basis for a television series, a science-fictionalized version of The Lone Ranger, but the series was never made, in part because another series called Rocky Jones, Space Ranger was already in the planning stages.
Lucky Starr is the hero of a series of science fiction books by Isaac Asimov, using the pen name "Paul French" and intended for children.
Lucky Starr and the Big Sun of Mercury is the fourth novel in the Lucky Starr series, six juvenile science fiction novels by Isaac Asimov that originally appeared under the pseudonym Paul French. The novel was first published by Doubleday & Company in March 1956. Since 1972, reprints have included a foreword by Asimov explaining that advancing knowledge of conditions on Mercury has rendered some of the novel's descriptions of that world inaccurate.
Lucky Starr and the Moons of Jupiter is the fifth novel in the Lucky Starr series, six juvenile science fiction novels by Isaac Asimov that originally appeared under the pseudonym Paul French. The novel was first published by Doubleday & Company in August 1957. It is the only novel by Asimov set in the Jovian system.
Lucky Starr and the Oceans of Venus is the third novel in the Lucky Starr series, six juvenile science fiction novels by Isaac Asimov that originally appeared under the pseudonym Paul French. The novel was first published by Doubleday & Company in 1954. Since 1972, reprints have included a foreword by Asimov explaining that advancing knowledge of conditions on Venus have rendered the novel's descriptions of that world inaccurate.
Lucky Starr and the Pirates of the Asteroids is the second novel in the Lucky Starr series, six juvenile science fiction novels by Isaac Asimov that originally appeared under the pseudonym Paul French. The novel was first published by Doubleday & Company in November 1953.
Saturn has made appearances in fiction since the 1752 novel Micromégas by Voltaire. In the earliest depictions, it was portrayed as having a solid surface rather than its actual gaseous composition. In many of these works, the planet is inhabited by aliens that are usually portrayed as being more advanced than humans. In modern science fiction, the Saturnian atmosphere sometimes hosts floating settlements. The planet is occasionally visited by humans and its rings are sometimes mined for resources.
Sirian or Sirians may refer to:
Le Micromégas is a 1752 novella by the French philosopher and satirist Voltaire. Along with his story "Plato's Dream", it is an early example in the literary genre of science fiction and has its place in the development of the history of literature. Some uncertainty surrounds the first publication of Micromégas, with possible editions dating to 1751 or as early as 1739, but with the widely accepted publication being 1752.
Solar eclipses on Saturn occur when the natural satellites of Saturn pass in front of the Sun as seen from Saturn. These eclipses happen fairly often. For example, some of Saturn's moons can have a solar eclipse every day depending on the saturnian season.
In a writing career spanning 53 years (1939–1992), science fiction and popular science author Isaac Asimov (1920–1992) wrote and published 40 novels, 383 short stories, over 280 non-fiction books, and edited about 147 others.
