The Greenwich Prime Meridian was used as the universal base point in the calculation of longitude until the IERS Reference Meridian was established in 1983 through the Global Positioning System (GPS) showed that the Greenwich Meridian was not precisely located along the 0-degree, 0-minute and 0-second longitude. The Greenwich Meridian was established in 1851 by 19th-century British mathematician and astronomer, Sir Biddell Airy. Prime meridians are established on most of the major celestial bodies of the Solar System including the planets as well as some large moons.The Greenwich Prime Meridian was established at Royal Observatory in London and it is the universal prime meridian.

Unlike the Equator’s position that is determined by the Earth’s rotational axis, the position of the Prime Meridian has been defined arbitrarily over the years as Greenwich in the United Kingdom.

For instance, the Royal Observatory which is based on the Eurasian tectonic plate moves about 2.5 cm each year. Most countries in the world have adopted an IERS system for their maps which is relative to the tectonic plates on which they lie. This map was created by a user. The countries which participated in the conference included the Netherlands, Switzerland, Spain, Denmark, Germany, France, Great Britain, Hawaii, Costa Rica, Chile, Japan, Liberia, Russia, the United States, Salvador, Paraguay, San Domingo, Venezuela, Brazil, Guatemala, Mexico and the Ottoman Empire. Any prime meridian is geographically and mathematically defined and is located at the 0-degree longitude and therefore is used as the base point for other longitudes which are measured in the degrees to the west or east of the prime meridian they are located. Prime Meridian showcases cuisine from the Southeast Coast line to the Appalachian Trails, blended together to create a modern take on traditional Georgia comfort foods. The Greenwich Prime Meridian was adopted as the universal prime meridian after leaders and scientists from all over the world met for the International Meridian Conference in 1884 which was took place in Washington D.C., USA. The Bering Strait was used as a prime meridian, and it is the current location of the International Date Line which runs through the Diomede Islands of the Bering Strait.The Pulkovo Meridian was used as the base longitude of the Russian Empire before the adoption of the universal Greenwich Meridian in 1884. The IERS Reference Meridian is an imaginary line that is recognized to lie on the 0-degree, 0-minute and 0-second longitude. Increased globalization experienced in the early 20th century attributed to the improved sea and air travel made it necessary for the countries around the world to have a common prime meridian which could be used as the universal reference point for longitude to be used for trans-continental and trans-oceanic travel by ship and airplane captains. 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.On October 1st, 1884, Washington D.C. was the host of the International Meridian Conference whose aim was to establish a standard prime meridian to unify the local times used in railway timetables. The International Earth Rotation and Reference Systems Services is the body mandated in the maintenance of the IERS Reference Meridian.The International Earth Rotation and Reference System was adopted in 1987 by the International Union of Geodesy and Geophysics and the International Astronomical Union and was mandated to maintain the global time and reference frame standards using the International Celestial Reference System as well as the Earth Orientation Parameters. The conference was a continuation of the 1888 International Geodesic Conference held in Rome. Prime Meridian. The IERS Reference Meridian originates from the North Pole in the Arctic Ocean and runs southwards to the South Pole in Antarctica passing through 8 countries which include the Spain, UK, France, Algeria, Mali, Burkina Faso, Togo, and Ghana. Fine Dining.

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