Prime meridian - Wikipedia
A prime meridian is an arbitrarily chosen meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its anti-meridian (the 180th meridian in a 360°-system) form a great circle.
What is the Prime Meridian - and why is it in Greenwich?
Just as the equator separates the northern and southern hemispheres, the Prime Meridian separates the eastern and western hemispheres. When you stand across the line, you have one foot in the east and one in the west. But what exactly is a …
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 …
Greenwich meridian | Definition, History, Location, Map ...
Greenwich meridian, an imaginary line, last established in 1851, used to indicate zero degrees longitude. It passes through Greenwich, London, and ends at the North and South poles. Because it indicated zero degrees 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 …
Prime Meridian: Definition, History, and Significance
2023年6月26日 · The Prime Meridian is an imaginary line that divides the Earth into Eastern and Western Hemispheres. It is the longitude line with a value of 0 degrees and runs from the North Pole to the South Pole, passing through the Royal Observatory in Greenwich, London.
prime meridian - Kids | Britannica Kids | Homework Help
The prime meridian is the imaginary line that divides Earth into two equal parts: the Eastern Hemisphere and the Western Hemisphere. The prime meridian is also used as the basis for the world’s time zones.