Prime Meridian - National Geographic Society
https://www.nationalgeographic.org/encyclopedia/prime-meridian/
WEBOct 19, 2023 · The prime meridian is the line of 0° longitude, the starting point for measuring distance both east and west around Earth. The prime meridian is arbitrary, meaning it could be chosen to be anywhere.Any line of longitude (a meridian) can serve as the 0° longitude line. However, there is an international agreement that the meridian that runs through Greenwich, England, is considered the ...
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