Sun/Related Articles

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A list of Citizendium articles, and planned articles, about Sun.
See also changes related to Sun, or pages that link to Sun or to this page or whose text contains "Sun".

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  • Ancient Greece [r]: The loose collection of Greek-speaking city-states centered on the Aegean Sea which flourished from the end of the Mycenaean age to the Roman conquest of Greece in 146 BC. [e]
  • Animal [r]: A multicellular organism that feeds on other organisms, and is distinguished from plants, fungi, and unicellular organisms. [e]
  • Argon [r]: A chemical element with atomic number 18. It is an inert gas in group 18 of the modern periodic table. [e]
  • Astrobiology [r]: The study of life in the universe. [e]
  • Astronomical Unit [r]: Mean distance from the Earth to the Sun used to provide relative distances within the solar system; value is approx. 150 million kms. [e]
  • Astronomy [r]: The study of objects and processes in the observable universe, e.g. stars, planets, comets or asteroids. [e]
  • Atmospheric reentry [r]: The movement of human-made or natural objects as they enter the atmosphere of a planet from outer space, in the case of Earth from an altitude above the 'edge of space.' [e]
  • Aurora Borealis [r]: Visible light stimulated by the interaction of the solar wind and the upper atmosphere, around the North Magnetic Pole. [e]
  • Babylon 5 [r]: A science fiction television series and franchise which was created by J Michael Straczynski. [e]
  • Basalt [r]: A common extrusive volcanic rock. [e]
  • Big Bang [r]: A cosmological theory holding that the universe originated approximately 20 billion years ago from the violent explosion of a very small agglomeration of matter of extremely high density and temperature. [e]
  • Black hole [r]: Area of space-time with a gravitational field so intense that its escape velocity is equal to or exceeds the speed of light. [e]
  • Calcium [r]: The chemical element with the symbol Ca and atomic number 20. [e]
  • Carbon dioxide [r]: Chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom. [e]
  • Ceres (dwarf planet) [r]: The most massive body in the asteroid belt. Originally classified as a planet, it later became the number one asteroid; now a dwarf planet. [e]
  • Day [r]: Defined as 86,400 seconds, using the SI definition of second. [e]
  • Digital object identifier [r]: Unique label for a computer readable object that can be found on the internet, usually used in academic journals. [e]
  • Doom [r]: Please do not use this term in your topic list, because there is no single article for it. Please substitute a more precise term. See Doom (disambiguation) for a list of available, more precise, topics. Please add a new usage if needed.
  • Drought [r]: Lack or insufficiency of rain for an extended period that severely disturbs the hydrologic cycle in an area. [e]
  • Dwarf planet [r]: A celestial object orbiting a sun that is massive enough to obtain a round shape but too small to clear its orbital path of other celestial bodies. [e]
  • Earth [r]: The third planet from the Sun in our solar system; the only place in the universe known by humanity to harbor life. [e]
  • East [r]: One of the four cardinal directions in geography; the opposite of west. [e]
  • Ecliptic [r]: Great circle that apparent orbit of Sun makes on celestial sphere. [e]
  • Galaxy [r]: Gravitationally bound system of stars typically contain ten million to one trillion stars. [e]
  • Galileo Galilei [r]: (1564-1642) Italian scientist, a pioneer in combining mathematical theory with systematic experiment in science, who came into conflict with the Church. [e]
  • Geophysics [r]: The study of the Earth by quantitative physical methods, namely seismic, magnetic, electrical, electromagnetic, thermal and radioactivity methods. [e]
  • Gold [r]: Chemical element 79, symbol Au, a lustrous corrosion-resistant precious metal used for money, electronics and jewelry. [e]
  • Gravitational lens [r]: A lens formed when light from a very distant, bright source (such as a quasar) is 'bent' around a massive object (such as a cluster of galaxies) between the source object and the observer. [e]
  • Gravitation [r]: The tendency of objects with mass to accelerate toward each other. [e]
  • Greek mythology [r]: Body of myths and legends belonging to the ancient Greeks concerning their Gods and heroes, the nature of the world, and the origins and significance of their own cult and ritual practices. [e]
  • Immanuel Kant [r]: (1724–1804) German idealist and Enlightenment philosopher who tried to transcend empiricism and rationalism in the Critique of Pure Reason. [e]
  • International Astronomical Union [r]: Internationally recognized authority for assigning designations to celestial bodies (stars, planets, asteroids, etc), headquartered in Paris, France. [e]
  • Iron [r]: An important transition metal and chemical element with the symbol Fe (Latin: ferrum) and atomic number 26. [e]
  • Java platform [r]: A bunch of programs needed for creating and running programs written in the Java programming language. [e]
  • Johannes Kepler [r]: (1571-1630) German astronomer best known for his three laws of planetary motion. [e]
  • Jupiter (planet) [r]: The fifth planet from the Sun in our solar system; named after the Roman god of the same name; largest planet in our solar system. [e]
  • Korea [r]: Historical country and peninsula of northeastern Asia, comprising the states of North Korea and South Korea. [e]
  • Kuiper belt [r]: Region of the Solar System extending from the orbit of Neptune (at 30 AU) to approximately 55 AU from the Sun, containing thousands of icy bodies, some of which are on highly elliptical orbits, periodically visiting the inner solar system as comets. [e]
  • Light day [r]: Distance that light travels in a vacuum in one day; 1 light day = 25,902,068,371,200 m = 2.5902067 * 1013m. [e]
  • Light hour [r]: Distance that the light travels in vacuum in one hour, 1.0792528 * 1012m [e]
  • Light minute [r]: Distance that light travels in vacuum in one minute; 17,987,547,480 m = 1.7987547 * 1010m. [e]
  • Light second [r]: Distance that light travels in vacuum in one second; 2.99792458 * 108m. [e]
  • Light year [r]: Distance that light travels in vacuum in one year; 9,460,730,472,580.800 km = 9.4607304 * 1012 km. [e]
  • Lightning [r]: An atmospheric discharge of electricity accompanied by thunder, which typically occurs during thunderstorms, and sometimes during volcanic eruptions or dust storms. [e]
  • Light [r]: The part of the electromagnetic spectrum visible to a species' biological eye. [e]
  • Lunar eclipse [r]: When the Earth’s shadow passes across the full Moon. [e]
  • Magnetic field [r]: Vector field H caused by permanent magnets, conduction currents, and displacement currents. [e]
  • Magnetometer [r]: A scientific instrument used to measure the strength and/or direction of the magnetic field in the vicinity of the instrument. [e]
  • Mars (planet) [r]: The fourth planet from the Sun in our solar system; named after the Roman god of war; also known as the "Red Planet". [e]
  • Massachusetts Institute of Technology [r]: A private research university in Cambridge, Massachusetts with a strong emphasis on scientific and technological research. [e]
  • Mass [r]: The total amount of a substance, or alternatively, the total energy of a substance. [e]
  • Mercury (planet) [r]: The first planet from the Sun in our solar system; named after the Roman messenger of gods. [e]
  • Methane [r]: A chemical compound and alkane with the molecular formula CH4, and the principal component of natural gas. [e]
  • Microbiology [r]: The study of microorganisms (overlapping with areas of virology, bacteriology, mycology, and parasitology). [e]
  • Microorganism [r]: A 'germ', an organism that is too small to be seen individually with the naked eye. [e]
  • Mile [r]: A non-SI unit of length, equal to 1.609 kilometres, and equivalent to 5,280 feet. [e]
  • Milky Way [r]: The Milky Way galaxy which contains our solar system. [e]
  • Moon [r]: The only natural satellite of our planet, Earth. [e]
  • Mountain [r]: An elevated area of a planet or moon, rapidly rising to high altitude. [e]
  • Mycology [r]: The branch of microbiology concerned with the study and effects of fungi [e]
  • Neo-Druidism [r]: Form of modern spirituality or religion, based loosely on ancient Celtic druidry, that promotes harmony and worship of nature, and respect for all beings, including the environment. [e]
  • Neptune (planet) [r]: The eighth planet from the Sun in our solar system; named after the Roman god of the sea. [e]
  • Nova (astronomy) [r]: Variable star in the class of cataclysmic variable stars, which is normally very faint but occasionally erupts in an immense explosion, increasing its brightness a thousand to tens of millions of times; similar but unrelated to supernovae. [e]
  • Ocean circulation [r]: The constant motion of the ocean waters caused by winds, the gravity pull of both Moon and Sun and seawater density differences. [e]
  • Organism [r]: An individual living individual: a complex, adaptive physical system that acts a integrated unit that sustains metabolism and reproduces progeny that resemble it. [e]
  • Pascal (unit) [r]: The SI unit of pressure; the force of one newton acting uniformly over an area of one square metre. [e]
  • Planet [r]: A cosmic body orbiting a star. [e]
  • Plate tectonics [r]: Theory that explains geological phenomena such as seismicity, volcanism, continental drift, and mountain building in terms of the formation, destruction, movement, and interaction of the earth's lithospheric plates. [e]
  • Pluto (dwarf planet) [r]: A dwarf planet beyond Neptune that, for many years, was officially considered a planet; named after the Roman god of the underworld. [e]
  • Protoscience [r]: A field of study that appears to conform to the initial phase of the scientific method, but involves speculation. [e]
  • Red dwarf (star) [r]: Small and relatively cool star, of low luminosity, being in the main sequence either late K or M spectral type. [e]
  • Rock (geology) [r]: Naturally occurring solid aggregate of one or more minerals and/or mineraloids. [e]
  • Satellite [r]: An object that travels in orbit around a more massive body. [e]
  • Saturn (planet) [r]: The sixth planet from the Sun in our solar system; named after the Roman god of agriculture and harvest. [e]
  • Solar system [r]: The sun and the planets orbiting it. [e]
  • Spacecraft [r]: Vehicle designed to operate, with or without a crew, for use beyond the Earth's atmosphere. [e]
  • Star [r]: A massive, luminous ball of plasma that is held together by gravity. [e]
  • Sundial [r]: An instrument for measuring time, using the position of the sun in the sky. [e]
  • Sunshine (2007 film) [r]: 2007 British science-fiction film directed by Danny Boyle; deals with humanity's relationship with the sun. [e]
  • Thales [r]: (fl. 6th century B.C.) Greek philosopoher sometimes considered the founder of modern philosophy and astronomy; important chiefly because he sought for a natural explanation of phenomena rather than a mythical or religious explanation. [e]
  • The Book of the New Sun [r]: A long award-winning novel of the distant future by Science Fiction author Gene Wolfe. [e]
  • The Báb [r]: (October 20, 1819 – July 9,1850) The founder and prophet of The Bábí Faith or Babism. [e]
  • Tidal force [r]: Gravitational forces acting on an extended body as a result of the varying distance between the source of the gravitational force, and the different parts of the extended body. [e]
  • Tide [r]: The rising or falling of an ocean due to tidal forces. [e]
  • Tycho Brahe [r]: Danish astronomer of the 16th century. [e]
  • Tychonic system [r]: The model of universe developed by the observational astronomer Tycho Brahe in response to astronomical and cosmological discussions that took place in his time. [e]
  • Ultraviolet [r]: The part of the electromagnetic spectrum between the visible light and X-ray regions [e]
  • Unix [r]: A computer operating system originally conceived and developed by a group of researchers as an unofficial project while they were working at AT&T's Bell Laboratories. [e]
  • Uranus (planet) [r]: The seventh planet from the Sun in our solar system; name after the Greek god of the sky. [e]
  • Venus (planet) [r]: The second planet from the Sun in our solar system; named after the Roman goddess of love. [e]
  • Viking 1 [r]: The first of two spacecraft sent to Mars as part of NASA's Viking program. [e]
  • Viking program [r]: The successful mission of space probes to Mars, Viking 1 and Viking 2, each designed to study the planet, and launched 20 August 1975, and 9 September 1975 respectively. [e]
  • Volcanically active worlds [r]: Planetary bodies where openings in the surface crust allow material to forcefully escape, often in visibily spectacular showers of ash, rock or gases. [e]
  • Year [r]: A unit of time measurement that corresponds to one revolution of the earth around the sun, approximately 365¼ days. [e]