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English Wikipedia references for Nasa.gov 351-400 of 26570
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| Tamara E. Jernigan Tamara_E._Jernigan | |
| Torino Scale Torino Scale is a method for categorizing the impact hazard associated with near-Earth objects (NEOs) such as asteroids and comets. astronomers and the public to assess the seriousness of collision predictions, by combining probability statistics and known kinetic damage potentials into a single threat value. The Palermo Technical Impact Hazard Scale is a similar, but more complex scale. Torino_Scale | |
| Tunguska event The Tunguska Event, or Tunguska explosion, was a powerful explosion that occurred near the Podkamennaya (Lower Stony) Tunguska River in what is now Krasnoyarsk Krai of Russia, at around 7Julian calendar, in use locally at the time). Tunguska_event | |
| Tide Tide | |
| Tesla turbine Tesla turbine is a bladeless centrifugal flow turbine expander patented by Nikola Tesla in 1913. It is referred to as a bladeless turbine because it uses the boundary layer effect and not a fluid impinging upon the blades as in a conventional turbine. The Tesla turbine is also known as the boundary layer turbine, cohesion-type turbine, and Prandtl layer turbine (after Ludwig Prandtl). Tesla_turbine | |
| Turbocharger A turbocharger, or turbo, is a gas compressor used for forced-induction of an internal combustion engine. Like a supercharger, the purpose of a turbocharger is to increase the density of air entering the engine to create more power. However, a turbocharger differs in that the compressor is powered by a turbine driven by the engine's own exhaust gases. Turbocharger | |
| The Six Million Dollar Man The Six Million Dollar Man is an American television series about a fictional cyborg working for the OSI (which was usually said to refer to the Office of Scientific Intelligence, but sometimes was called the Office of Scientific Investigation as well as the Office of Strategic Intelligence). The_Six_Million_Dollar_Man | |
| Tablespoon tablespoon is a type of large spoon usually used for serving. A tablespoonful, an amount approximately equal to the capacity of one tablespoon, is commonly used as a measure of volume used in cooking. It is abbreviated in English as T., tb., tblspn, tbs. or tbsp. Canada, Japan, New Zealand, South Africa and the UK define 1 level tablespoon as 15 Tablespoon | |
| Tupolev Tu-144 Tupolev_Tu-144 | |
| Tupolev Tu-144 Talk:Tupolev_Tu-144 | |
| Telesto (moon) Telesto_(moon) | |
| Triassic–Jurassic extinction event The Triassic–Jurassic extinction event marks the boundary between the Triassic and Jurassic periods, , and is one of the major extinction events of the Phanerozoic eon, profoundly affecting life on land and in the oceans. A whole class (conodonts), twenty percent of all marine families and all large crurotarsans (non-dinosaurian archosaurs), some remaining therapsids, and many of the large amphibians were wiped out. Triassic–Jurassic_extinction_event | |
| Telstar Telstar was the first active communications satellite, and the first satellite designed to transmit telephone and high-speed data communications. Its name is used to this day for a number of television broadcasting satellites.However, the original, experimental program included just two nearly-identical satellites Telstar | |
| Taiga Taiga (, from Turkic or Mongolian) is a biome characterized by conifer forests. The taiga can be described as rather cold (almost like the tundra), with many trees (like the deciduous forest, except the trees aren't deciduous). Covering most of inland Alaska, Canada, Sweden, Finland, inland Norway, Highland Scotland and Russia (especially Siberia), as well as parts of the extreme northern continental United States (Northern Minnesota, Michigan, Upstate New York, New Hampshire, and Maine), northern Kazakhstan and Japan (Hokkaidō), the taiga is the world's largest terrestrial biome. Taiga | |
| Time travel Time travel is the concept of moving between different moments in time in a manner analogous to moving between different points in space, either sending objects (or in some cases just information) backwards in time to a moment before the present, or sending objects forward from the present to the future without the need to experience the intervening period (at least not at the normal rate). Time_travel | |
| Uranium Uranium () is a silvery-white metallic chemical element in the actinide series of the periodic table that has the symbol U and atomic number 92. Besides its 92 protons, a uranium nucleus can have between 141 and 146 neutrons, with 146 (U-238) and 143 in its most common isotopes. Uranium | |
| Universe The Universe is defined as everything that physically exists:space and time, all forms of matter, energy and momentum, and the physical laws and constants that govern them. However, the term Universe may be used in slightly different contextual senses, denoting such concepts as the cosmos, the world or Nature. Universe | |
| University of California, Berkeley University_of_California,_Berkeley | |
| University of California, Santa Cruz University_of_California,_Santa_Cruz | |
| Ultraviolet Ultraviolet (UV) light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than x-rays, in the range 10 nm to 400eV to 124 eV. It is so named because the spectrum consists of electromagnetic waves with frequencies higher than those that humans identify as the color violet.UV light is found in sunlight and is emitted by electric arcs and specialized lights such as black lights. Ultraviolet | |
| Umbriel (moon) Umbriel_(moon) | |
| Urban heat island An urban heat island (UHI) is a metropolitan area which is significantly warmer than its surrounding rural areas. The temperature difference usually is larger at night than during the day and larger in winter than in summer, and is most apparent when winds are weak. Urban_heat_island | |
| Unobtainium Unobtainium is a humorous term that refers to an extremely rare, costly, or physically impossible material needed to fulfill a given design for a given application. The name is a blend derived from unobtainable + ium (the suffix for a number of elements). Variations include unobtanium and unattainium, with the same meaning. It is sometimes referred to as element 404, after the HTTP 404 Not Found error. Unobtainium | |
| United States Naval reactor United States Naval reactor refers to nuclear reactors used by the United States Navy aboard certain ships to produce power for propulsion, electric power, catapulting airplanes in aircraft carriers, and a few more minor uses. Such Naval nuclear reactors have a complete power plant associated with them. United_States_Naval_reactor | |
| Vostok 1 Vostok_1 | |
| Vacuum vacuum is a volume of space that is essentially empty of matter, such that its gaseous pressure is much less than atmospheric pressure. The word comes from the Latin term for "empty," but in reality, no volume of space can ever be perfectly empty. Even putting aside the complexities of the quantum vacuum, the classical notion of a perfect vacuum with gaseous pressure of exactly zero is only a philosophical concept and never is observed in practice. Vacuum | |
| Euclidean vector Talk:Euclidean_vector | |
| Venus Venus | |
| Vannevar Bush Vannevar Bush (March 11, 1890 June 28, 1974; probably ) was an American engineer and science administrator known for his work on analog computing, his political role in the development of the atomic bomb, and the idea of the memex, which was seen decades later as a pioneering concept for the World Wide Web. Vannevar_Bush | |
| Voyager 1 The Voyager 1 spacecraft is a 722-kilogram (1,592 lb) robotic space probe of the outer Solar System and beyond, launched September 5, 1977. It remains operational, currently pursuing its extended mission to locate and study the boundaries of the Solar System, including the Kuiper belt and beyond. Its original mission was to visit Jupiter and Saturn; and it was the first probe to provide detailed images of the moons of these planets. Voyager_1 | |
| Voyager 2 The Voyager 2 spacecraft is an unmanned interplanetary space probe launched on August 20, 1977. Identical in form to its sister Voyager program craft Voyager 1, Voyager 2 followed a slower trajectory that allowed it to be kept in the ecliptic (the plane of the Solar System) so that it could be sent to Uranus and Neptune by means of gravity assist during the 1981 encounter at Saturn. Voyager_2 | |
| White dwarf A white dwarf, also called a degenerate dwarf, is a small star composed mostly of electron-degenerate matter. Because a white dwarf's mass is comparable to that of the Sun and its volume is comparable to that of the Earth, it is very dense. Their faint luminosity comes from the emission of stored heat. White_dwarf | |
| Wing wing is a surface used to produce lift for flight through the air or another gaseous or fluid medium. The wing shape is usually an airfoil. The word originally referred only to the foremost limbs of birds, but has been extended to include the wings of insects (see insect wing), bats, pterosaurs, and aircraft.A wing's aerodynamic quality is expressed as a Lift-to-drag ratio. Wing | |
| Welsh language Welsh (''), is a member of the Brythonic branch of Celtic spoken natively in Wales, in England by some along the Welsh border and in the Welsh immigrant colony in the Chubut Valley in Argentine Patagonia.There are speakers of Welsh throughout the world, most notably in the rest of Great Britain, the United States, Canada, Australia and New Zealand. Welsh_language | |
| Work breakdown structure work breakdown structure (WBS) in project management and systems engineering, is a tool used to define and group a project's discrete work elements (or tasks) in a way that helps organize and define the total work scope of the project.A work breakdown structure element may be a product, data, a service, or any combination. Work_breakdown_structure | |
| Wernher von Braun Dr. Wernher Magnus Maximilian Freiherr von Braun (March 23, 1912 German rocket physicist and astronautics engineer became one of the leading figures in the development of rocket technology in Germany and the United States. Wernher von Braun is sometimes said to be the preeminent rocket engineer of the 20th century.In his 20s and early 30s, von Braun was the central figure in Germany's pre-war rocket development program, responsible for the design and realization of the deadly V-2 combat rocket during World War II. Wernher_von_Braun | |
| Weather Weather is a set of all the phenomena occurring in a given atmosphere at a given time. Weather phenomena lie in the troposphere. Weather refers, generally, to day-to-day temperature and precipitation activity, whereas climate is the term for the average atmospheric conditions over longer periods of time. When used without qualification, "weather" is understood to be the weather of Earth. Weather | |
| Waterfall model waterfall model is a sequential software development process, in which progress is seen as flowing steadily downwards (like a waterfall) through the phases of Conception, Initiation, Analysis, Design (validation), Construction, Testing and maintenance. It should be readily apparent that the waterfall development model has its origins in the manufacturing and construction industries; highly structured physical environments in which after-the-fact changes are prohibitively costly, if not impossible. Waterfall_model | |
| Area rule Whitcomb area rule, also called the transonic area rule, is a design technique used to reduce an aircraft's drag at transonic and supersonic speeds, particularly between Mach 0.8 and 1.2. This is the operating speed range of the majority of commercial and military fixed-wing aircraft today. Area_rule | |
| Wendy Carlos Wendy Carlos (born November 14, 1939) is an American composer and electronic musician. Carlos' fame originated in the late 1960s with recordings made on the Moog synthesizer, which was a relatively new and unknown instrument at the time; most notable were L.P.' Wendy_Carlos | |
| Xenon Xenon ( or Xenon | |
| X-ray X-radiation (composed of X-rays) is a form of electromagnetic radiation. X-rays have a wavelength in the range of 10 to 0.01 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3 × 1016 Hz to 3 × 1019 Hz) and energies in the range 120 eV to 120 keV. X-ray | |
| Astrobiology Talk:Astrobiology | |
| Yeast Yeasts are eukaryotic microorganisms classified in the kingdom Fungi, with about 1,500 species currently described; they dominate fungal diversity in the oceans. Most reproduce asexually by budding, although a few do so by binary fission. Yeasts are unicellular, although some species with yeast forms may become multicellular through the formation of a string of connected budding cells known as pseudohyphae, or false hyphae as seen in most molds. Yeast | |
| Zinc Zinc (, from and also known as spelter) is a metallic chemical element with the symbol Zn and atomic number 30. It is a first-row transition metal in group 12 of the periodic table. Zinc is chemically similar to magnesium because its ion is of similar size and its only common oxidation state is +2. Zinc | |
| Zodiacal light The zodiacal light is a faint, roughly triangular, whitish glow seen in the night sky which appears to extend up from the vicinity of the sun along the ecliptic or zodiac. In mid-northern latitudes, the zodiacal light is best observed in the western sky in the spring after the evening twilight has completely disappeared, or in the eastern sky in the autumn just before the morning twilight appears. Zodiacal_light | |
| 1995 1995 (MCMXCV) was a common year starting on Sunday. 1995 | |
| 1961 Year 1961 (MCMLXI) was a common year starting on Sunday (link will display full calendar) of the Gregorian calendar.As MAD Magazine pointed out on its cover for the March 1961 issue, this was the first "upside-up" year—i.e., one in which the numerals that form the year look the same as when the numerals are rotated upside down—since 1881, and the last until 6009. 1961 | |
| 2001: A Space Odyssey (film) 2001 is a 1968 science fiction film directed by Stanley Kubrick, written by Kubrick and Arthur C. Clarke. The film deals with thematic elements of human evolution, technology, artificial intelligence, and extraterrestrial life, and is notable for its scientific realism, pioneering special effects, ambiguous and often surreal imagery, sound in place of traditional narrative techniques, and minimal use of dialogue. 2001:_A_Space_Odyssey_(film) | |
| 2008 2008 (MMVIII) was a leap year that started on Tuesday of the Anno Domini era (or Common Era).2008 was designated as International Year of Planet Earth. International Year of Languages. International Year of the Potato. International Year of Sanitation. Year of the Frog. European Year of Intercultural Dialogue. 2008 |
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