Prime meridian (Greenwich) - Wikipedia
The Greenwich meridian is a prime meridian, a geographical reference line that passes through the Royal Observatory, Greenwich, in London, England. [1] From 1884 to 1974, the Greenwich meridian was the international standard prime meridian, used worldwide for
What is the Prime Meridian - and why is it in Greenwich?
The Prime Meridian in Greenwich is marked by a metal line fixed into the Royal Observatory courtyard, and at night by a laser beam. The beam originates from a point above the Airy Transit Circle, the telescope used to determine the Greenwich Meridian.
本初子午线 - 百度百科
英文名称：prime meridian 0°经线 ，是计算东西经度的起点。 1884年国际会议决定用通过英国 格林威治 （Greenwich）天文台原址 子午仪 中心的经线为本初子午线。
Greenwich meridian | Definition, History, Location, Map, & Facts ...
Greenwich meridian, an imaginary line, last established in 1851, that was used to indicate 0° longitude. It passes through Greenwich, a borough of London, and terminates at the North and South poles. Because it indicated 0° longitude, it was also known as the prime meridian.
The Prime Meridian: Establishing Global Time and Space
2018年8月31日 · The Prime Meridian is the universally decided zero longitude, an imaginary north/south line which bisects the world into two and begins the universal day. The line starts at the north pole, passes across the Royal Observatory in Greenwich, England, and ends at …
History - Greenwich, Longitude, Prime Meridian & GMT - BBC
2005年4月21日 · Discover how Longitude was solved and why Greenwich is the home of world time and the Prime Meridian. Measuring latitude, how far you are north or south of the equator, was not a problem in...
The Greenwich Meridian at The Royal Observatory, London
The Greenwich Meridian line, Longitude 0°, runs through the historic Airy Transit Circle telescope, which is housed at the Royal Observatory at Greenwich in south-east London. The line runs across the floor in the courtyard there.
Where is the Prime Meridian? - WorldAtlas
2017年9月7日 · The Greenwich Prime Meridian starts from the North Pole in the Arctic Ocean and runs southwards to the South Pole in Antarctica. Along its stretch, the Greenwich Prime Meridian passes through nine countries which are Spain, UK, France, Mali, Togo, Burkina Faso, Algeria, Ghana, and Queen Maud Land, a Norwegian territory in Antarctica.
The Origins of the Greenwich Prime Meridian | SciHi Blog
2021年10月13日 · At the International Meridian Conference held in Washington, D.C., 22 countries voted to adopt the Greenwich meridian as the prime meridian of the world. The French argued for a neutral line, mentioning the Azores and the Bering Strait but eventually abstained and continued to use the Paris meridian until 1911 .
Greenwich Mean Time (GMT) | History & Definition | Britannica
2024年11月7日 · Greenwich Mean Time (GMT), the name for mean solar time of the longitude (0°) of the Royal Greenwich Observatory in England. The meridian at this longitude is called the prime meridian or Greenwich meridian. Greenwich Mean Time (GMT) has been used to clearly designate epoch by avoiding confusing references to local time systems (zones).