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Príncipe Island
Príncipe is the smaller, northern major island of the country of São Tomé and Príncipe lying off the west coast of Africa in the Gulf of Guinea. It has an area of (including offshore islets) and a population of 7,324 at the 2012 Census;Projecção a nível distrital 2012 - 2020 Instituto Nacional de Estatística the latest official estimate (at May 2018) was 8,420.Instituto Nacional de Estatística. The island is a heavily eroded volcano speculated to be over three million years old, surrounded by smaller ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gulf Of Guinea
The Gulf of Guinea is the northeasternmost part of the tropical Atlantic Ocean from Cape Lopez in Gabon, north and west to Cape Palmas in Liberia. The intersection of the Equator and Prime Meridian (zero degrees latitude and longitude) is in the gulf. Among the many rivers that drain into the Gulf of Guinea are the Niger and the Volta. The coastline on the gulf includes the Bight of Benin and the Bight of Bonny. Name The origin of the name Guinea is thought to be an area in the region, although the specifics are disputed. Bovill (1995) gives a thorough description: The name " Guinea" was also applied to south coast of West Africa, north of the Gulf of Guinea, which became known as "Upper Guinea", and the west coast of Southern Africa, to the east, which became known as "Lower Guinea". The name "Guinea" is still attached to the names of three countries in Africa: Guinea, Guinea-Bissau, and Equatorial Guinea, as well as New Guinea in Melanesia. Geography The main river ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Afonso, Prince Of Portugal
Afonso, Hereditary Prince of Portugal (; 18 May 147513 July 1491) was the heir apparent to the throne of Portugal. He was born in Lisbon, Portugal, and died in a horse-riding accident on the banks of the river Tagus. Heir apparent Afonso, named after his grandfather, King Afonso V, was the only son of King John II and Eleanor of Viseu. The king was very fond of him and named the island of Príncipe after him (''príncipe'' meaning "prince" in the Portuguese language). Marriage Afonso's grandfather Afonso V of Portugal had sided with Joanna la Beltraneja, who was a rival for the throne of Castile against her half-aunt, Queen Isabella I of Castile. She was never considered legitimate and, when the king was dying, no one took her as a serious contender for the crown. Isabella was due to inherit the crown, but Afonso V was keen to interfere with the succession in Castile. In 1475 he married his niece Joanna, whom he considered the legitimate heir to the crown. Since her adul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Starlight
Starlight is the light emitted by stars. It typically refers to visible electromagnetic radiation from stars other than the Sun, observable from Earth at night, although a component of starlight is observable from Earth during daytime. Sunlight is the term used for the Sun's starlight observed during daytime. During nighttime, albedo describes solar reflections from other Solar System objects, including moonlight, planetshine, and zodiacal light. Observation Observation and measurement of starlight through telescopes is the basis for many fields of astronomy, including photometry and stellar spectroscopy. Hipparchus did not have a telescope or any instrument that could measure apparent brightness accurately, so he simply made estimates with his eyes. He sorted the stars into six brightness categories, which he called magnitudes.''Astronomy''. https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/Astronomy-Draft-20160817.pdf: Rice University. 2016. p. 761. - ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Eclipse Of May 29, 1919
A total solar eclipse occurred on Thursday, May 29, 1919. With the duration of totality at maximum eclipse of 6 minutes 50.75 seconds, it was the longest solar eclipse since May 27, 1416. A longer total solar eclipse would later occur on June 8, 1937. As it occurred only 0.8 days after perigee (May 28), the Moon's apparent diameter was larger. It was visible throughout most of South America and Africa as a partial eclipse. Totality occurred through a narrow path across southeastern Peru, northern Chile, central Bolivia and Brazil after sunrise, across the Atlantic Ocean and into south central Africa, covering southern Liberia, southern French West Africa (the part now belonging to Ivory Coast), southwestern tip of British Gold Coast (now Ghana), Príncipe Island in Portuguese São Tomé and Príncipe, southern Spanish Guinea (now Equatorial Guinea), French Equatorial Africa (the parts now belonging to Gabon and R. Congo, including Libreville), Belgian Congo (now DR Con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthur Stanley Eddington
Sir Arthur Stanley Eddington (28 December 1882 – 22 November 1944) was an English astronomer, physicist, and mathematician. He was also a philosopher of science and a populariser of science. The Eddington limit, the natural limit to the luminosity of stars, or the radiation generated by accretion onto a compact object, is named in his honour. Around 1920, he foreshadowed the discovery and mechanism of nuclear fusion processes in stars, in his paper "The Internal Constitution of the Stars".The Internal Constitution of the Stars A. S. Eddington The Scientific Monthly Vol. 11, No. 4 (Oct., 1920), pp. 297–303 At that time, the source of stellar energy was a complete mystery; Eddington was the first to correctly speculate that the source was fusion of hydrogen into helium. Eddington wrote a number of articles that announced and explained Einstein's theory of general relativity to the English-speaking world. World War I had severed many lines of scientific communication, and n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theory Of Relativity
The theory of relativity usually encompasses two interrelated theories by Albert Einstein: special relativity and general relativity, proposed and published in 1905 and 1915, respectively. Special relativity applies to all physical phenomena in the absence of gravity. General relativity explains the law of gravitation and its relation to the forces of nature. It applies to the cosmological and astrophysical realm, including astronomy. The theory transformed theoretical physics and astronomy during the 20th century, superseding a 200-year-old theory of mechanics created primarily by Isaac Newton. It introduced concepts including 4-dimensional spacetime as a unified entity of space and time, relativity of simultaneity, kinematic and gravitational time dilation, and length contraction. In the field of physics, relativity improved the science of elementary particles and their fundamental interactions, along with ushering in the nuclear age. With relativity, cosmology and astro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albert Einstein
Albert Einstein ( ; ; 14 March 1879 – 18 April 1955) was a German-born theoretical physicist, widely acknowledged to be one of the greatest and most influential physicists of all time. Einstein is best known for developing the theory of relativity, but he also made important contributions to the development of the theory of quantum mechanics. Relativity and quantum mechanics are the two pillars of modern physics. His mass–energy equivalence formula , which arises from relativity theory, has been dubbed "the world's most famous equation". His work is also known for its influence on the philosophy of science. He received the 1921 Nobel Prize in Physics "for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect", a pivotal step in the development of quantum theory. His intellectual achievements and originality resulted in "Einstein" becoming synonymous with "genius". In 1905, a year sometimes described as his ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portuguese São Tomé And Príncipe
São Tomé and Príncipe islands were a colony of the Portuguese Empire from its discovery in 1470 until 1975, when independence was granted by Portugal. History The Portuguese explorers João de Santarém and Pêro Escobar discovered the islands around 1470,Francisco, Agostinho, p.24 which they found uninhabited.Grivetti, Shapiro, p. 1849 The São Tomé island was named by the Portuguese in honor of Saint Thomas, as they discovered the island on his feast day, while the Príncipe island (Prince's island) was named in honor of Afonso, Prince of Portugal, his father's favorite. The first attempt of settlement in the islands began in 1485, when the Portuguese Crown granted to João de Paiva the São Tomé island. However, this attempt was not successful, because the settlers were unable to produce food in the specific conditions and climate that the islands offered, and because of the tropical diseases that affected the settlers. It was only in 1493 when King John II of Port ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Capital (political)
A capital city or capital is the municipality holding primary status in a country, state, province, department, or other subnational entity, usually as its seat of the government. A capital is typically a city that physically encompasses the government's offices and meeting places; the status as capital is often designated by its law or constitution. In some jurisdictions, including several countries, different branches of government are in different settlements. In some cases, a distinction is made between the official (constitutional) capital and the seat of government, which is in another place. English-language news media often use the name of the capital city as an alternative name for the government of the country of which it is the capital, as a form of metonymy. For example, "relations between Washington and London" refer to " relations between the United States and the United Kingdom". Terminology and etymology The word ''capital'' derives from the Latin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fortaleza De Santo António Da Ponta Da Mina
The Fortaleza de Santo António da Ponta da Mina or Forte de Ponta da Mina is a ruined fort located east of the island capital Santo António in the island of Príncipe in São Tomé and Príncipe. It is located at the headland Ponta da Mina. The fortress consisted of two parts: the Bateria Real and the Bateria do Príncipe. Heritage of Portuguese Influence The fort was built in 1695. In 1706, the city of was invaded by the French during the , destroying the town and its fortre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theobroma Cacao
''Theobroma cacao'', also called the cacao tree and the cocoa tree, is a small ( tall) evergreen tree in the family Malvaceae. Its seeds, cocoa beans, are used to make chocolate liquor, cocoa solids, cocoa butter and chocolate. The largest producer of cocoa beans in 2018 was Ivory Coast, 2.2 million tons. Description Its leaves are alternate, entire, unlobed, long and broad. Flowers The flowers are produced in clusters directly on the trunk and older branches; this is known as cauliflory. The flowers are small, diameter, with pink calyx. The floral formula, used to represent the structure of a flower using numbers, is ✶ K5 C5 A(5°+52) (5). While many of the world's flowers are pollinated by bees (Hymenoptera) or butterflies/moths (Lepidoptera), cacao flowers are pollinated by tiny flies, ''Forcipomyia'' midges in the subfamily Forcipomyiinae. Using the natural pollinator ''Forcipomyia'' midges for ''Theobroma cacao'' was shown to have more fruit production than usin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cane Sugar
Sucrose, a disaccharide, is a sugar composed of glucose and fructose subunits. It is produced naturally in plants and is the main constituent of white sugar. It has the molecular formula . For human consumption, sucrose is extracted and refined from either sugarcane or sugar beet. Sugar mills – typically located in tropical regions near where sugarcane is grown – crush the cane and produce raw sugar which is shipped to other factories for refining into pure sucrose. Sugar beet factories are located in temperate climates where the beet is grown, and process the beets directly into refined sugar. The sugar-refining process involves washing the raw sugar crystals before dissolving them into a sugar syrup which is filtered and then passed over carbon to remove any residual colour. The sugar syrup is then concentrated by boiling under a vacuum and crystallized as the final purification process to produce crystals of pure sucrose that are clear, odorless, and sweet. S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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