William Kentridge is a South African graphic artist, filmmaker, and theatre arts activist especially noted for a sequence of hand-drawn animated films he produced during the 1990s. The pungent humanism he revealed in these and other works echoed a larger European tradition of artists such as Honoré

dinosaur: Stegosauria: …were this large; for example, Kentrosaurus, from eastern Africa, was less than 2 metres high and 3.5 metres long.

Kentucky, constituent state of the United States of America. Rivers define Kentucky’s boundaries except on the south, where it shares a border with Tennessee along a nearly straight line of about 425 miles (685 km), and on the southeast, where it shares an irregular, mountainous border with

Walter Brennan: …grandfatherly horse farm owner in Kentucky, and in 1940 he earned an unprecedented third Academy Award, for his performance as Judge Roy Bean in The Westerner. The latter movie also starred Gary Cooper, and the two actors subsequently worked together in other films.

Virginia and Kentucky Resolutions, (1798), in U.S. history, measures passed by the legislatures of Virginia and Kentucky as a protest against the Federalist Alien and Sedition Acts. The resolutions were written by James Madison and Thomas Jefferson (then vice president in the administration of John

bluegrass: …species found in North America, Kentucky bluegrass (Poa pratensis) is among the best-known. It was introduced from Eurasia. It is a popular lawn and pasture grass and is common in open areas and along roadsides. It is 30 to 100 cm (12 to 40 inches) tall, with soft, blue-green leaves;…

Kentucky coffeetree, (Gymnocladus dioicus), deciduous tree of the pea family (Fabaceae), native to North America from New York and southern Ontario to Oklahoma. In colonial times the roasted seeds were used as a coffee substitute, and the plant is sometimes cultivated as an ornamental. The strong

Robert Schenkkan: …got his big break with The Kentucky Cycle, a series of nine short plays that spanned 1775–1975 and chronicled three American families: African American, Euro-American, and Native American; the play won the Pulitzer Prize for Drama, prior to a short Tony Award-nominated run on Broadway the following year.

Kentucky Lake: …created in 1944 when the Kentucky Dam impounded the Tennessee River. The dam, which is 206 feet (63 metres) high and 8,422 feet (2,567 metres) long, is the largest in the Tennessee Valley Authority (TVA) system. Located near Gilbertsville and 22 miles (35 km) upstream from Paducah, it regulates the…

Kentucky Derby, the most prestigious American horse race, established in 1875 and run annually on the first Saturday in May at Churchill Downs racetrack, Louisville, Kentucky. With the Preakness Stakes (run in mid-May) and the Belmont Stakes (early in June), it makes up American Thoroughbred

The Kentucky Derby is one of the most storied events in American sports. The legendary horse race is known for its traditions—mint julep, anyone?—and its long, colourful history. Held annually since 1875, the derby is the oldest American sporting event still being staged, and it is widely

Kentucky: Education: …Kentucky General Assembly passed the Kentucky Education Reform Act (KERA), a landmark piece of legislation that, most notably, provided for equal funding for all school districts based on enrollments. The goal was to achieve equitable educational opportunities for every Kentucky schoolchild. Beyond matters of finance, this act affected public education…

Taco Bell: …began a branding partnership with KFC, and in 1997 both became subsidiaries of Tricon Global Restaurants (later Yum! Brands) when it split from PepsiCo. A Chihuahua named Gidget became a popular, if controversial (the dog was accused of being a cultural stereotype), star of Taco Bell’s commercials in the late…

ham: The renowned Kentucky hams of the United States, for example, are cut exclusively from Hampshire hogs that have been fattened on beans, wild acorns, and clover until the last few weeks before the slaughter, when their diet is restricted to grain. The curing process entails a month…

Kentucky Lake, one of the largest man-made lakes in the eastern United States, situated in Marshall, Calloway, Livingston, Lyon, and Trigg counties, southwestern Kentucky, U.S.; its southern extremity overlaps into Tennessee. The lake is 184 miles (296 km) long and has more than 2,300 miles (3,700

Kentucky State University, public, coeducational institution of higher learning in Frankfort, Kentucky, U.S. It is a land-grant university consisting of colleges of arts and sciences, professional studies, schools of business and public administration, and Whitney M. Young, Jr., College of

Virginia and Kentucky Resolutions, (1798), in U.S. history, measures passed by the legislatures of Virginia and Kentucky as a protest against the Federalist Alien and Sedition Acts. The resolutions were written by James Madison and Thomas Jefferson (then vice president in the administration of John

shooting: The American frontier: The flintlock Kentucky rifle, produced from about 1750 by American gunsmiths from Germany and Switzerland, provided great accuracy to 180 metres (200 yards), then a long range. Virtually every village and settlement had a shooting match on weekends and holidays, often attracting a hundred or more marksmen.…

Kentucky River, tributary of the Ohio River in north-central Kentucky, U.S., and navigable along its 259-mile (417-km) course by means of locks. It is formed by the confluence of North, Middle, and South forks near Beattyville in Lee county and empties into the Ohio at Carrollton. The North Fork

square dance: …square dance to both the Kentucky running set of English derivation and to the cotillon, a stately French dance in square formation, popular at the court of Louis XV but supplanted later by the quadrille (also a “square” dance).

Kentucky State University, public, coeducational institution of higher learning in Frankfort, Kentucky, U.S. It is a land-grant university consisting of colleges of arts and sciences, professional studies, schools of business and public administration, and Whitney M. Young, Jr., College of

Ricky Skaggs: …Records and formed the band Kentucky Thunder. Renowned for their driving tempos and clean, fast instrumental technique, Ricky Skaggs and Kentucky Thunder became and remained a celebrated force in the field, winning seven Grammy Awards—including five awards for best bluegrass album (1998, 1999, 2004, 2006, 2008)—by the end of the…

Harriette Arnow: …in a Detroit suburb, and The Kentucky Trace (1974), in which a Revolutionary War soldier seeks his family. In the early 1960s Arnow published two books of social history about the pioneers who settled the Cumberland Plateau (in Kentucky and Tennessee): Seedtime on the Cumberland (1960) and The Flowering of…

U.S. state flag consisting of a dark blue field (background) with the state seal in the centre.At the time of its admission to the Union in 1792, Kentucky was considered to be on the nation’s western frontier, and this was reflected in the symbolism of the state seal. According to the design

University of Kentucky, public, coeducational institution of higher learning in Lexington, Kentucky, U.S. It includes the Chandler Medical Center, also in Lexington, and Lexington Community College. The campus consists of 12 colleges offering instruction in fields such as agriculture, business and

Rockford, city, seat (1836) of Winnebago county, northern Illinois, U.S. It lies on the Rock River, about 90 miles (145 km) northwest of Chicago. Rockford was founded by New Englanders in 1834 as separate settlements (commonly known as Kentville and Haightville, for the founders of each) on each

Camden: Kenwood House, the former home of the Mansfield family, was remodeled (1764–73) by Robert Adam. Its extensive grounds are now the setting for summer lawn concerts, and displayed within the house is a collection of masterpieces mainly by 18th-century British painters. Heath House was the…

Our Future Eco-Cities: Beyond Automobile Dependence: …them to evolve into more sustainable and livable forms.

Kenya, country in East Africa famed for its scenic landscapes and vast wildlife preserves. Its Indian Ocean coast provided historically important ports by which goods from Arabian and Asian traders have entered the continent for many centuries. Along that coast, which holds some of the finest

Kenya: Political process: Its early principal opposition, the Kenya African Democratic Union (KADU), merged with KANU in 1964. Since Kenya’s transformation from single-party KANU rule back into a multiparty state in the early 1990s, many political parties have been created and alliances between parties have been formed, often in advance of upcoming elections.…

Kenya African National Union (KANU), Kenyan political party. Organized in 1960, KANU was one of two major political parties formed in preparation for independence—the other party, the Kenya African Democratic Union, was ultimately absorbed by KANU after independence. Led by Jomo Kenyatta, the party

Jomo Kenyatta: Return to Kenya: From the Kenya African Teachers College, which he directed as an alternative to government educational institutions, Kenyatta organized a mass nationalist party. But he had to produce tangible results in return for the allegiance of his followers, and the colonial government in Kenya was still dominated by…

flag of Kenya: …World War II was the Kenya African Union (KAU), the predecessor of the Kenya African National Union. The party’s original flag, introduced on September 3, 1951, was black and red with a central shield and arrow. In the following year the background was altered to three equal horizontal stripes of…

Stone Age: East Africa: …true blade technique, called the Kenya Capsian, together with the art of pottery making. More or less contemporary with the localities where the earliest pottery is found in East Africa, a series of sites has been discovered yielding typical microlithic assemblages and referable to the Kenya Wilton, also found in…

Stone Age: East Africa: …minute hand axes; and the Kenya Fauresmith, basically of Acheulean inspiration and very similar to the true Fauresmith of Southern Africa. Carefully shaped round stone balls, believed to have been used as bola weights in hunting, constitute part of the Fauresmith assemblage. In the post-Gamblian dry phase, microlithic tools appear…

Tom Mboya: …was general secretary of the Kenya Federation of Labour (KFL), an especially important post since no strictly political African national organizations were allowed in Kenya until 1960.

Kenya: Cultural institutions: The Kenya National Archives and Documentation Service in Nairobi, housed in a building that was originally the Bank of India, holds an increasing number of government and historical documents and also contains exhibits of arts and crafts and photographs. A national library service board has been…

Kenya: The arts: The Kenya National Theatre, a part of the Kenya Cultural Centre, is the country’s premier venue for drama. The affiliated National Theatre School (founded 1968) provides professional training for Kenyan playwrights and performers of traditional music and dance. Independent art facilities, such as the GoDown Arts…

Kenya: Kenyatta’s rule: …a new opposition party, the Kenya People’s Union (KPU), but his position was weakened by legislation that required elected officials who switched parties to resign their seats and run for reelection. By contrast, Kenyatta’s authority was strengthened because greater powers had been given to the office of president.

Stone Age: East Africa: …toolmaking traditions are found: the Kenya Stillbay, a Levalloisian derivative characterized by small- to medium-sized, bifacially flaked points or minute hand axes; and the Kenya Fauresmith, basically of Acheulean inspiration and very similar to the true Fauresmith of Southern Africa. Carefully shaped round stone balls, believed to have been used…

boutonneuse fever, a mild typhuslike fever caused by the bacterium Rickettsia conorii conorii and transmitted by the dog tick Rhipicephalus sanguineus. The disease is endemic to the Mediterranean region. Similar forms of boutonneuse fever occur in Africa, India, and southern Europe but are caused

Kenya: Plant and animal life: …in the mid-1990s by the Kenya Wildlife Service. The plan has attempted to draw local communities into the management and distribution of the income derived from wild animals in the vicinity, thus making people more tolerant of the animals’ presence. The program has been somewhat successful, and, with community involvement,…

national flag consisting of horizontal stripes of black, red, and green separated by thinner stripes of white; in the centre are two crossed spears and a shield. The width-to-length ratio of the flag is 2 to 3.From the 16th to the mid-20th century, Portugal, Oman, Britain, and Germany all

history of Kenya, a survey of notable events and people in the history of Kenya. The country, located in the eastern region of the African continent, is famed for its scenic landscapes and vast wildlife preserves, and its Indian Ocean coast has historically important ports, such as Mombasa, by

Mount Kenya, volcano, central Kenya, lying immediately south of the Equator. It is the second highest mountain in Africa after Kilimanjaro, which is located some 200 miles (320 km) to the south. The Mount Kenya area was added to UNESCO’s World Heritage List in 1997. The base of the mountain lies at

Kenya, country in East Africa famed for its scenic landscapes and vast wildlife preserves. Its Indian Ocean coast provided historically important ports by which goods from Arabian and Asian traders have entered the continent for many centuries. Along that coast, which holds some of the finest

Kenyah, indigenous people of Sarawak and Indonesian Borneo, grouped with the Kayan or under the general name Bahau. In the late 20th century the Kenyah were reported to number 23,000. They live near river headwaters, in close association with the Kayan, with whose culture they have much in common

Kenya: The arts: Kenyan literature includes a large body of oral and written folklore, much of the latter collected by British anthropologists. During the colonial era, writers of European origin residing in Kenya, such as Elspeth Huxley (The Flame Trees of Thika, 1959) and Isak Dinesen (Out of…

hominin: >Kenyanthropus in Hominini. Some characteristics that have distinguished hominins from other primates, living and extinct, are their erect posture, bipedal locomotion, larger brains, and behavioral characteristics such as specialized tool use and, in some cases, communication through language.

Australopithecus: …additional species of early human, Kenyanthropus platyops (3.5 mya). The first undisputed evidence of the genus Homo—the genus that includes modern human beings—appears as early as 2.8 mya, and some of the characteristics of Homo resemble those of earlier species of Australopithecus; however, considerable debate surrounds the identity of the…

Louis Leakey: …team discovered the remains of Kenyapithecus, another link between apes and early man that lived about 14 million years ago.

Kenya: Daily life and social customs: …(recognizing Daniel arap Moi) and Kenyatta Day, both in October, honour two of the country’s presidents, while Madaraka (Swahili: Government) Day (June 1) celebrates Kenya’s attainment of self-governance in 1964.

Kenya: Health and welfare: Kenyatta National Hospital in Nairobi is the country’s chief referral and teaching institution, and there are also provincial and district hospitals. In rural areas, health centres and dispensaries offer diagnostic services, obstetric care, and outpatient treatment, although they often lack adequate facilities, trained personnel, and…

Jomo Kenyatta was an African statesman and nationalist, the first prime minister (1963–64) and then the first president (1964–78) of independent Kenya. Kenyatta was born as Kamau, son of Ngengi, at Ichaweri, southwest of Mount Kenya in the East African highlands. His father was a leader of a small

Uhuru Kenyatta is a Kenyan businessman and politician who held several government posts before serving as president of Kenya from 2013 to 2022. The son of Jomo Kenyatta, Kenya’s first president, Uhuru was raised in a wealthy and politically powerful Kikuyu family. He attended St. Mary’s School in

Uhuru Kenyatta is a Kenyan businessman and politician who held several government posts before serving as president of Kenya from 2013 to 2022. The son of Jomo Kenyatta, Kenya’s first president, Uhuru was raised in a wealthy and politically powerful Kikuyu family. He attended St. Mary’s School in

phonolite: Kenyite, from Mount Kenya, in east Africa, is rich in olivine. The phonolite of Olbrück, Ger., a rather popular local building stone, is said to contain about 15 percent nosean and 8 percent leucite. Phonolite trachytes occur on St. Helena and a number of other…

Kenyon College, private, coeducational institution of higher learning in Gambier, Ohio, U.S., about 40 miles (65 km) northeast of Columbus. It is a liberal arts college affiliated with the Episcopal church. Kenyon offers bachelor’s degree programs in the performing arts, social sciences,

Eric Bentley: …to Theatre Arts and the Kenyon Review in the United States. Bentley’s translations of Brecht and reviews of European theatre won him recognition and various grants in the United States. From 1952 to 1969 he taught at Columbia University. He was professor of theatre at the State University of New…

Dame Kathleen Kenyon was an English archaeologist who excavated Jericho to its Stone Age foundation and showed it to be the oldest known continuously occupied human settlement. After working (1929) with the British archaeologist Gertrude Caton-Thompson at the Zimbabwe ruins in Southern Rhodesia

Dame Kathleen Kenyon was an English archaeologist who excavated Jericho to its Stone Age foundation and showed it to be the oldest known continuously occupied human settlement. After working (1929) with the British archaeologist Gertrude Caton-Thompson at the Zimbabwe ruins in Southern Rhodesia

dictionary: Usage labels: …1948 by an American philologist, John S. Kenyon, when he discriminated between “cultural levels,” which refer to the degree of education and cultivation of a person, and “functional varieties,” which refer to the styles of speech suitable to particular situations. Thus, a cultivated person rightly uses informal or colloquial language…

Andrei Okounkov: …and his coauthor, American mathematician Richard Kenyon, discovered the remarkable result that the outline of any two-dimensional picture of the crystal is always an algebraic curve and so is defined by polynomial equations (equations of the form p(x) = a0 + a1x + a2x2 + ⋯ + anxn).

Ozaki Kōyō: …of friends, he formed the Kenyūsha, a magazine and literary association that exercised a major influence in the development of the Japanese novel for nearly 20 years. Through his study of Tokugawa period (1603–1867) literature, he led a revival of interest in the 17th-century writer Ihara Saikaku, whose sharp perceptions…

Ogata Kenzan was a Japanese potter and painter, brother to the artist Ogata Kōrin. He signed himself Kenzan, Shisui, Tōin, Shōkosai, Shuseidō, or Shinshō. Kenzan received a classical Chinese and Japanese education and pursued Zen Buddhism. At the age of 27 he began studying with the potter Ninsei

Emerald Fennell: Directing career: …student named Oliver Quick (Barry Keoghan) who is drawn into the world of his fabulously wealthy classmate Felix Catton (Jacob Elordi). Presenting himself to Felix as poor with a tragic home life, Oliver is eventually found out to be not the disadvantaged—or harmless—friend he seems to be. Set mostly…

Nannerl Overholser Keohane is an American academician and administrator who gained particular prominence when she became the first woman president of Duke University in Durham, N.C. Keohane received an undergraduate degree from Wellesley (Massachusetts) College in 1961. She studied for the next two

Robert O. Keohane is an American political scientist, international-relations scholar, and educator. He is a leading figure within neoliberal institutionalism, an approach to international relations that emphasizes the use of international institutions by states to further their interests through

Robert O. Keohane is an American political scientist, international-relations scholar, and educator. He is a leading figure within neoliberal institutionalism, an approach to international relations that emphasizes the use of international institutions by states to further their interests through

Keokuk, city, Lee county, extreme southeastern Iowa, U.S. It lies along the Mississippi River (bridged to Hamilton, Illinois) at the mouth of the Des Moines River, about 40 miles (65 km) southwest of Burlington. The first settler in the area, Samuel C. Muir, arrived in 1820, and a trading post was

Keokuk was a Sauk (Sac) Indian orator and politician who became chief by ceding Native American lands to win white support and by rallying opposition to his own tribe’s resistance leaders. Born of the Fox clan, Keokuk early exhibited physical prowess, keen intelligence, and a gift of persuasion. He

Keoladeo Ghana National Park, wildlife sanctuary in eastern Rajasthan state, northwestern India, just south of the city of Bharatpur. It was founded in the late 19th century as a hunting preserve by Suraj Mal, the maharaja of Bharatpur princely state, and became a bird sanctuary in 1956. Declared a

Keoladeo Ghana National Park, wildlife sanctuary in eastern Rajasthan state, northwestern India, just south of the city of Bharatpur. It was founded in the late 19th century as a hunting preserve by Suraj Mal, the maharaja of Bharatpur princely state, and became a bird sanctuary in 1956. Declared a

Toronto Maple Leafs: …Bower, centre Red Kelly, centre Dave Keon, defenseman Tim Horton, left wing Frank Mahovlich, left wing Bob Pulford, and defenseman Allan Stanley) won three Stanley Cups in a row from 1961–62 to 1963–64 and one more during the 1966–67 season.

Kendujhar, town, northern Odisha (Orissa) state, eastern India. It is situated on an upland plateau bordered to the west and south by low hills. Kendujhar is a trade centre for the farm and forest products of the surrounding area. Hand-loom weaving is also important. The town contains an old raja’s

Kendujhar, town, northern Odisha (Orissa) state, eastern India. It is situated on an upland plateau bordered to the west and south by low hills. Kendujhar is a trade centre for the farm and forest products of the surrounding area. Hand-loom weaving is also important. The town contains an old raja’s

Kéa, westernmost of the Cyclades (Modern Greek: Kykládes) group of Greek islands in the Aegean Sea. It constitutes a dímos (municipality) in the South Aegean (Nótio Aigaío) periféreia (region). Kéa lies about 13 miles (21 km) east of the southern tip of Attica (Attikí). With an area of 50.4 square

Iao Valley: Kepaniwai Park and Heritage Gardens, near the valley entrance and Wailuku, has landscaped gardens representing Hawaii’s various cultures. Iao Stream is dammed there to provide wading and swimming pools.

Iao Valley: …feature commemorates the bloody 1790 battle of Kepaniwai (meaning “Dammed Stream,” referring to the blockage of the torrent by the bodies of Maui warriors), which added Maui to the kingdom of Kamehameha I.

Gyorgy Kepes was a Hungarian-born American painter, designer, photographer, teacher, and writer who had considerable influence on many areas of design. Shortly after his graduation in 1928 from the Royal Academy of Fine Art in Budapest, Kepes experimented with photograms, photographic prints made

ancient Iran: Manichaeism: …a large part of the Kephalaia, a collection of the religious injunctions of Mani, was recovered in a Coptic version found in Egypt. These texts can now be collated with the versions of Manichaean doctrines as reported by the Church Fathers, including St. Augustine. From this cumulative documentation, to which…

Appalachian Mountains: Study and exploration: It remained for Horace Kephart, a St. Louis, Missouri, librarian turned naturalist who came to the southern mountains in 1904, to bring the isolated and scenic region to national attention. From his writings grew the interest and impetus that led to the establishment of the Great Smoky Mountains…

Kepler, U.S. satellite that detected extrasolar planets by watching—from orbit around the Sun—for a slight dimming during transits as these bodies passed in front of their stars. An important objective of Kepler’s mission was to determine the percentage of planets that are in or near their stars’

John Banville: Fiction: Doctor Copernicus (1976), Kepler (1981), and The Newton Letter: An Interlude (1982) are fictional biographies based on the lives of noted scientists. These three works use scientific exploration as a metaphor to question perceptions of fiction and reality. Mefisto (1986) is written from the point of view of…

combinatorics: Packing and covering: Another famous problem was Kepler’s conjecture, which concerns the densest packing of spheres. If the spheres are packed in cannonball fashion—that is, in the way cannonballs are stacked to form a triangular pyramid, indefinitely extended—then they fill π/18, or about 0.74, of the space. In 1611 the German astronomer…

conic section: Post-Greek applications: …Johannes Kepler derived his first law of planetary motion: A planet travels in an ellipse with the Sun at one focus. Galileo Galilei published the first correct description of the path of projectiles—a parabola—in his Dialogues of the Two New Sciences (1638). In 1639 the French engineer Girard Desargues initiated…

Kepler’s laws of planetary motion, in astronomy and classical physics, laws describing the motions of the planets in the solar system. They were derived by the German astronomer Johannes Kepler, whose analysis of the observations of the 16th-century Danish astronomer Tycho Brahe enabled him to

Kepler’s Nova, one of the few supernovae (violent stellar explosions) known to have occurred in the Milky Way Galaxy. Jan Brunowski, Johannes Kepler’s assistant, first observed the phenomenon in October 1604; Kepler studied it until early 1606, when the supernova was no longer visible to the

Kepler’s second law of planetary motion, in astronomy and classical physics, one of three laws describing the motions of the planets in the solar system and which states that a radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time. The validity of Kepler’s

Kepler’s Nova, one of the few supernovae (violent stellar explosions) known to have occurred in the Milky Way Galaxy. Jan Brunowski, Johannes Kepler’s assistant, first observed the phenomenon in October 1604; Kepler studied it until early 1606, when the supernova was no longer visible to the

Kepler’s Nova, one of the few supernovae (violent stellar explosions) known to have occurred in the Milky Way Galaxy. Jan Brunowski, Johannes Kepler’s assistant, first observed the phenomenon in October 1604; Kepler studied it until early 1606, when the supernova was no longer visible to the

mechanics: Circular orbits: …case (for circular orbits) of Kepler’s third law, which is discussed in the article celestial mechanics. Using the fact that v = 2πr/T, where 2πr is the circumference of the orbit and T is the time to make a complete orbit (i.e., T is one year in the life of…

Johannes Kepler German astronomer who discovered three major laws of planetary motion, conventionally designated as follows: (1) the planets move in elliptical orbits with the Sun at one focus; (2) the time necessary to traverse any arc of a planetary orbit is proportional to the area of the sector

Kepler-186f, the first Earth-sized extrasolar planet to be found within its star’s habitable zone—the orbital region where an Earth-like planet could possess liquid water on its surface and thus possibly support life. Kepler-186f was discovered in 2014 in data taken by the Kepler satellite before

extrasolar planet: Directions for future research: …the first Earth-sized extrasolar planets, Kepler-20e and Kepler-20f (with radii 0.87 and 1.03 times the radius of Earth, respectively). By the end of its mission in 2018, Kepler had discovered 2,741 planets, about two-thirds of all then known extrasolar planets. Thousands more candidate planets awaited confirmation.

extrasolar planet: Directions for future research: …Earth-sized extrasolar planets, Kepler-20e and Kepler-20f (with radii 0.87 and 1.03 times the radius of Earth, respectively). By the end of its mission in 2018, Kepler had discovered 2,741 planets, about two-thirds of all then known extrasolar planets. Thousands more candidate planets awaited confirmation.

Kepler: One of these, Kepler-22b, has a radius 2.4 times that of Earth and was the first planet found within the habitable zone of a star like the Sun. Kepler-20e and Kepler-20f were the first Earth-size planets to be found (their radii are 0.87 and 1.03 times the radius…

Kepler-452b, the first approximately Earth-sized planet to be found in a Sun-like star’s habitable zone—the orbital region where an Earth-like planet could possess liquid water on its surface and thus possibly support life. Kepler-452b was discovered in 2015, in data that the Kepler satellite had

Keplerian telescope, instrument for viewing distant objects, the basis for the modern refractive telescope, named after the great German astronomer Johannes Kepler. Its eyepiece, or ocular, is a convex (positive, or convergent) lens placed in back of the focus, the point at which the parallel light

Epicurus: The schools at Athens and elsewhere: …bought a house and, in the garden, established a school, which came to be known as Ho Kepos (The Garden). At this time in Athens, cultural life was dominated by the Academy of Plato and the Lyceum of Aristotle, both of which had passed into the hands of successors. These…