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Longitude calculations can be simplified using a clock is set to the local time of a starting point whose longitude is known, transporting it to a new location, and using it for astronomical observations. The longitude of the new location can be determined by comparing the difference of local mean time and the time of the transported clock.
Family tree showing the relationship of each person to the orange person, including cousins and gene share. A family tree, also called a genealogy or a pedigree chart, is a chart representing family relationships in a conventional tree structure. More detailed family trees, used in medicine and social work, are known as genograms.
John Harrison was born in Foulby in the West Riding of Yorkshire, the first of five children in his family. [2] His stepfather worked as a carpenter at the nearby Nostell Priory estate. A house on the site of what may have been the family home bears a blue plaque. [3] Around 1700, the Harrison family moved to the Lincolnshire village of Barrow ...
Oldenborg dynasty family tree (in Czech), shows relationships between branches of Oldenburg dynasty, i.e. the Kings of Denmark, the Czars of Russia, Kings of Sweden, the Kings of Greece, the Kings of Norway. Dukes of Holstein=Gottrop (Oldenburg) Canute the Great's family tree; Kings of Norway family tree. Modern Norwegian Royal Family; Kings of ...
Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time is a 1995 best-selling book by Dava Sobel about John Harrison, an 18th-century clockmaker who created the first clock (chronometer) sufficiently accurate to be used to determine longitude at sea—an important development in navigation.
The family tree of Louis III, Duke of Württemberg (ruled 1568–1593) The family tree of "the Landas", a 17th-century family [1]. Genealogy (from Ancient Greek γενεαλογία (genealogía) ' the making of a pedigree ') [2] is the study of families, family history, and the tracing of their lineages.
The son of Aglaos, Eratosthenes was born in 276 BC in Cyrene.Now part of modern-day Libya, Cyrene had been founded by Greeks centuries earlier and became the capital of Pentapolis (North Africa), a country of five cities: Cyrene, Arsinoe, Berenice, Ptolemias, and Apollonia.
The Greek Marinus of Tyre (CE 70–130) was the first to assign a latitude and longitude to every place on his maps. From the late 9th century CE, the Arabian Kamal was used in equatorial regions, to measure the height of Polaris above the horizon. This instrument could only be used in latitudes where Polaris is close to the horizon.