Greenwich Observatory is located in Greenwich, 8 kilometers southeast of the British capital London. To be exact, it is located on a hill in Greenwich Park, London, overlooking the Thames. The Royal Observatory in Greenwich, England was built by King charles ii of England in Greenwich, London on 1675. At that time, British navigation developed rapidly. In order to meet the needs of longitude measurement at sea, the British authorities decided to set up an observatory in the Royal Greenwich Garden on the Thames River in the southeast suburb of London, about 20 kilometers from the city center. After World War II, he moved to Fort Hearst Montsou, Sussex, England, because of air pollution, and still uses the name of "Greenwich Royal Observatory".
The establishment of Greenwich Observatory was suggested by Sir Jonah Murray in 1674, and its task was only to measure for the Ordnance Department. King charles ii was persuaded, and he hired Flemish to carry out the construction work. The Ordnance Department undertook the construction of the Observatory, and Charlie provided key instruments and equipment for the Observatory with his own private funds. Frosted House, originally a part of the Observatory, is the first facility with a specific scientific research purpose in Britain, which was designed by Sir Christopher Lane with the assistance of robert hooke. Its construction cost 520 pounds (20 pounds over budget), which was mainly used to rebuild the Duke Humphrey Tower, because it deviated from due north 13 degrees, which annoyed Genvrain Steed.
Not only did he put the scientific instruments needed by the Flemish people in the catalogue, but over time, he also merged a certain number of other jobs, such as punctuality and later editing the office of Her Majesty's nautical yearbook.
Murray donated two clocks, which were built by Thomas Tampin and placed in an octagonal house 20 feet high, which is the main room of the building. They have a unique design, and each has a pendulum 13 inch (3.96 meters) long, which swings every 4 seconds, with an unprecedented error of only 7 seconds per day. Astronomers in Britain have long used the Greenwich Observatory base for measurements: four independent meridians pass through the building. The meridian basic prime meridian established by 185 1 was ratified at the international conference of 1884, and passed the Airy satellite instrument of the Observatory.
It was originally placed in the courtyard by a brass strip for a long time, and was upgraded to stainless steel on 1999 12 16, shining in the night sky in north London with a powerful green laser. Greenwich Mean Time (GMT) is based on Greenwich Mean Time (up to 1954). Since then, GMT time has been calculated by other observatories that are still active. GMT is usually called Universal Time, which is calculated by observing those wireless power sources from outside the Milky Way, and converted into several forms, including UT0 (Universal Time from a distant observatory), UT 1 (Universal Time for correcting polar motion) and Coordinated Universal Time (UT 1 Universal Time with a difference of less than 0.9 seconds with SI seconds). To help other times synchronize with Greenwich Mean Time, Royal astronomer John Pound installed a time ball at 1833. It is set at 1:00( 13:00) in the afternoon of every day of the year (GMT in winter and BST in summer).
London
London is the capital of the United Kingdom of Great Britain and Northern Ireland and the world's financial center, accounting for more than 40% of the world's foreign exchange transactions, and is also known as "Newland Port" with new york and Hongkong. London is the political, economic, cultural and financial center of Britain and the city with the most museums, libraries and gymnasiums in the world. The headquarters of Fortune 500 companies 19, and seven universities of Fortune 100 companies are located in London. University College London ranks 8th in the world, 9th in Imperial College London, 27th in London School of Economics and Political Science, and 33rd in King's College London.
London is a leading world-class city. It is one of the richest, most developed, most prosperous and highest living standards cities in the world. It affects the whole world in politics, economy, culture, education, science and technology, finance, commerce, sports, media and fashion, and is a model of globalization.