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English Wikipedia references for Harvard.edu 351-400 of 24356
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| Redshift Talk:Redshift | |
| Robert Nozick Robert Nozick (November 16, 1938 January 23, 2002) was an American philosopher, and professor at Harvard University. He was educated at Columbia (A.B. 1959, summa cum laude), where he studied with Sidney Morgenbesser, at Princeton (Ph.D. 1963), and Oxford as a Fulbright Scholar. Robert_Nozick | |
| Radiometric dating Radiometric dating (often called radioactive dating) is a technique used to date materials, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates. It is the principal source of information about the absolute age of rocks and other geological features, including the age of the Earth itself, and can be used to date a wide range of natural and man-made materials. Radiometric_dating | |
| Robert Penn Warren Robert Penn Warren (April 24, 1905 – September 15, 1989) was an American poet, novelist, and literary critic and was one of the founders of New Criticism. He was also a charter member of the Fellowship of Southern Writers. He received the 1947 Pulitzer Prize for the Novel for his novel All the King's Men (1946) and the Pulitzer Prize for Poetry in 1957 and 1979. He is the only person to have won Pulitzer Prizes for both fiction and poetry. Robert_Penn_Warren | |
| Race and intelligence Race and intelligence have in some cases been claimed to be correlated. Contemporary debate on this issue focuses on the nature, causes, and rectifications of ethnic differences in intelligence test scores. The question of the relative roles of nature and nurture in correlation does not prove causation. No gene has been shown to be linked to intelligence, "so attempts to provide a compelling genetic link of race to intelligence are not feasible at this time". Race_and_intelligence | |
| Sculpture For a topical guide to this subject, see Outline of sculpture.Sculpture is three-dimensional artwork created by shaping or combining hard and/or plastic material, sound, and/or text and or light, commonly stone (either rock or marble), metal, glass, or wood. Some sculptures are created directly by finding or carving; others are assembled, built together and fired, welded, molded, or cast. Sculptures are often painted . sculptor. Sculpture | |
| Sigmund Freud Sigmund Freud (), born Sigismund Schlomo Freud (6 May 1856 Austrian psychiatrist who founded the psychoanalytic school of psychology. Freud is best known for his theories of the unconscious mind and the defense mechanism of repression and for creating the clinical practice of psychoanalysis for curing psychopathology through dialogue between a patient and a psychoanalyst. Sigmund_Freud | |
| Sun The Sun () is the star at the center of the Solar System. The Earth and other matter (including other planets, asteroids, meteoroids, comets, and dust) orbit the Sun, which by itself accounts for about 98.6% of the Solar System's mass. The mean distance of the Sun from the Earth is approximately , and its light travels this distance in 8 minutes and 19 seconds. Sun | |
| Star A star is a massive, luminous ball of plasma that is held together by gravity. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth. Other stars are visible in the night sky, when they are not outshone by the Sun. Historically, the most prominent stars on the celestial sphere were grouped together into constellations, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations. Star | |
| Second The second (SI symbols), sometimes abbreviated sec., is the name of a unit of time, and is the International System of Units (SI) base unit of time. It may be measured using a clock.SI prefixes are frequently combined with the word second to denote subdivisions of the second, e.g., Second | |
| Solar System Solar System consists of the Sun and those celestial objects bound to it by gravity, all of which formed from the collapse of a giant molecular cloud approximately 4.6 billion years ago. The Sun's retinue of objects circle it in a nearly flat disc called the ecliptic plane, most of the mass of which is contained within eight relatively solitary planets whose orbits are almost circular. Solar_System | |
| Linguistic relativity linguistic relativity principle (also known as the Sapir-Whorf Hypothesis) is the idea that the varying cultural concepts and categories inherent in different languages affect the cognitive classification of the experienced world in such a way that speakers of different languages think and behave differently because of it. Linguistic_relativity | |
| Scorpius Scorpius (, genitive Scorpii ) is one of the constellations of the zodiac; the associated astrological sign is called Scorpio. Its name is Latin for scorpion, and its symbol is (Unicode ). It lies between Libra to the west and Sagittarius to the east. It is a large constellation located in the southern hemisphere near the center of the Milky Way. Scorpius | |
| Sun Microsystems Sun_Microsystems | |
| Supernova supernova (pl. supernovae) is a stellar explosion. Supernovae are extremely luminous and cause a burst of radiation that often briefly outshines an entire galaxy, before fading from view over several weeks or months. During this short interval, a supernova can radiate as much energy as the Sun could emit over its life span. Supernova | |
| Salma Hayek Salma Valgarma Hayek Jiménez (born September 2, 1966) is a Mexican-American actress, director, and television and film producer. Hayek's charitable work includes increasing awareness on violence against women and discrimination against immigrants.Hayek is the first Mexican national to be nominated for an Academy Award for Best Actress. Salma_Hayek | |
| Sappho Sappho ( in English; Attic Greek 'Aeolic Greek'Ancient Greek lyric poet, born on the island of Lesbos. Later Greeks included her in the canonical list of nine lyric poets. Her birth was sometime between 630 and 612 BC, and it is said that she died around 570 BC. The bulk of her poetry, which was well-known and greatly admired throughout antiquity, has been lost, but her immense reputation has endured through surviving fragments. Sappho | |
| Sleep Sleep is a natural state of bodily rest observed in humans and other animals. It is distinguished from quiet wakefulness by a decreased ability to react to stimuli, and it is more easily reversible than hibernation or coma. It is common to all mammals and birds, and is also seen in many reptiles, amphibians, and fish. Sleep | |
| Sleep Talk:Sleep | |
| Stephen Jay Gould Stephen Jay Gould (September 10, 1941 paleontologist, evolutionary biologist, and historian of science. He was also one of the most influential and widely read writers of popular science of his generation. Gould spent most of his career teaching at Harvard University and working at the American Museum of Natural History in New York. In the latter years of his life, Gould also taught biology and evolution at New York University near his home in SoHo. Stephen_Jay_Gould | |
| Stellar evolution Stellar evolution is the process by which a star undergoes a sequence of radical changes during its lifetime. Depending on the mass of the star, this lifetime ranges from only a few million years (for the most massive) to trillions of years (for the less massive), considerably more than the age of the universe.Stellar evolution is not studied by observing the life of a single starastrophysicists come to understand how stars evolve by observing numerous stars, each at a different point in its life, and by simulating stellar structure with computer models. Stellar_evolution | |
| Sirius Sirius | |
| Supercluster Superclusters are large groups of smaller galaxy groups and clusters and are among the largest structures of the cosmos. Supercluster | |
| Seaborgium Seaborgium () is a chemical element in the periodic table that has the symbol Sg and atomic number 106. Seaborgium is a synthetic element whose most stable isotope 271Sg has a half-life of 1.9 minutes. Chemistry experiments with seaborgium have firmly placed it in group 6 as a heavier homologue to tungsten. Seaborgium | |
| Sculptor Group Sculptor_Group | |
| List of nearest stars list of stars nearest to the Earth is ordered by increasing distance out to a maximum of 5 parsecs (16.308 light-years). Including the Solar System, there are currently 50 stellar systems known which may lie within this distance. These systems contain a total of 65 known stars and 4 known brown dwarfs.Stars and brown dwarfs which have an apparent magnitude greater than 6.5, and which consequently cannot typically be observed with the naked eye, are shown in light blue. List_of_nearest_stars | |
| Singular they "Singular they" is a popular, non-technical expression for uses of the pronoun they (and its inflected forms) when plurality is not required by the context. For example, in the sentence "Anyone who thinks they have been affected should contact their doctor", the number of people affected is not giventhey and their are generic, non-referring pronouns (technically, anaphora) within the scope of a universal, distributive quantifier denoted by anyone. they is only Singular_they | |
| Space Shuttle NASA's Space Shuttle, officially called the Space Transportation System (STS), is the spacecraft currently used by the United States government for its human spaceflight missions and is scheduled to be retired from service in 2010. At launch, it consists of a rust-colored external tank (ET), two white, slender Solid Rocket Boosters (SRBs), and the orbiter, a winged spaceplane which is the space shuttle in the narrowest sense. Space_Shuttle | |
| Star catalogue star catalogue, or star catalog, is an astronomical catalogue that lists stars. In astronomy, many stars are referred to simply by catalogue numbers. There are a great many different star catalogues which have been produced for different purposes over the years, and this article covers only some of the more frequently quoted ones. Most of the recent catalogues are available in electronic format and can be freely downloaded from NASA's Astronomical Data Center and other places (see links at end). Star_catalogue | |
| String theory String theory is a developing branch of theoretical physics that combines quantum mechanics and general relativity into a quantum theory of gravity. The strings of string theory are one-dimensional oscillating lines, but they are no longer considered fundamental to the theory, which can be formulated in terms of points or surfaces, too. String_theory | |
| Space exploration Space exploration is the use of astronomy and space technology to explore outer space. Physical exploration of space is conducted both by human spaceflights and by robotic spacecraft. astronomy—pre-dates reliable recorded history, it was the development of large liquid-fueled rocket engines during the early 20th century that allowed physical space exploration to become a reality. Common rationales for exploring space include advancing scientific research, uniting different nat Space_exploration | |
| Solstice A solstice is an astronomical event that occurs twice each year, when the tilt of the Earth's axis is most inclined toward or away from the Sun, causing the Sun's apparent position in the sky to reach its northernmost or southernmost extreme. The name is derived from the Latin sol (sun) and sistere (to stand still), because at the solstices, the Sun stands still in declination; that is, the apparent movement of the Sun's path north or south comes to a stop before reversing direction. Solstice | |
| Solar wind solar wind is a stream of charged particles—plasma—upper atmosphere of the sun. It consists mostly of electrons and protons with energies of about 1 keV. The stream of particles varies in temperature and speed with the passage of time. These particles are able to escape the sun's gravity, in part because of the high temperature of the corona, but also because of high kinetic energy that particles gain through a process that is not well-understood. Solar_wind | |
| Star cluster Star clusters or star clouds are groups of stars. Two types of star clusters can be distinguishedglobular clusters are tight groups of hundreds of thousands of very old stars which are gravitationally bound, while open clusters, a more loosely clustered group of stars, generally contain less than a few hundred members, and are often very young. Star_cluster | |
| Sputtering Sputtering is a process whereby atoms are ejected from a solid target material due to bombardment of the target by energetic ions. It is commonly used for thin-film deposition, etching and analytical techniques (see below). Sputtering | |
| Sappho Talk:Sappho | |
| Speed of light The speed of light normally refers the speed of light in a vacuum, and is an important physical constant in modern physics. Light travels at different speeds through different materials, but in vacuum light travels fastest, and the speed does not vary with the color, intensity, or direction of travel. Speed_of_light | |
| Supernova Talk:Supernova | |
| Split infinitive A split infinitive or cleft infinitive is an English-language grammatical construction in which a word or phrase, usually an adverb or other adverbial, comes between the marker to and the bare infinitive (uninflected) form of a verb. A famous split infinitive occurs in the opening sequence of the Star Trek television seriesto boldly go where no man has gone before. Split_infinitive | |
| Stellar classification astronomy, stellar classification is a classification of stars based on its spectral characteristics. The spectral class of a star, is a designation of a class to a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure of the temperature in this chromosphere. Stellar_classification | |
| SN 1987A SN_1987A | |
| Snowball Earth Snowball Earth refers to hypotheses regarding paleoclimatic global-scale glaciation, claiming that the Earth's surface was nearly or entirely frozen at some points in its past. The occurrence of Snowball (or Slushball) Earths remains controversial. Proponents claim it best explains sedimentary deposits generally regarded as of glacial origin at tropical latitudes and other enigmatic features of the geological record. Snowball_Earth | |
| Strait of Hormuz Strait_of_Hormuz | |
| Saint George Saint George (ca. 275/281 – 23 April 303) was, according to tradition, a Roman soldier in the Guard of Diocletian, who is venerated as a Christian martyr. In hagiography Saint George is one of the most venerated saints in the Roman Catholic Church, Anglican Church, Eastern Orthodox Church, Oriental Orthodoxy, and the Eastern Catholic Churches. Saint_George | |
| Social class Social class refers to the hierarchical distinctions (or stratification) between individuals or groups in societies or cultures. Usually most societies have some notion of social class , but concretely defined social classes are not found in every known type of human societies. Social_class | |
| Stalinism Talk:Stalinism | |
| Serbia Serbia | |
| Spectrometer Spectrometer | |
| Six-Day War Six-Day_War | |
| Spica Spica () (also known as α Vir / α Virginis / Alpha Virginis) is the brightest star in the constellation Virgo, and the 15th brightest star in the nighttime sky. It is 260 light years distant from Earth. A blue giant, it is a variable of the Beta Cephei type. Spica |
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