Greenwich in London is home to the Prime Meridian, but just visiting the world-famous Royal Observatory won’t actually make you cross from one hemisphere to the other.

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It was on October 13, 1884 that the Greenwich meridian was officially adopted as the prime meridian, the imaginary north-south line where the longitude was 0 degrees. A.S.Ganesh gives you a ...

Recently there has been an unusual amount of interest in expanding U.S. territory. A better idea: why not go REALLY BIG and relocate the Prime Meridian from Greenwich, England, to Saint Paul ...

WASHINGTON, Oct. 14.--At the meeting of the International Prime Meridian Conference to-day, a resolution was adopted providing that longituae should be counted from the meridian of Greenwich in ...

Airy developed an accepted prime meridian line from the observatory at Greenwich, which became zero degrees longitude. It became a global benchmark for time zones, with each 15 degrees from the ...

A line marking the 'Prime Meridian' is at Longitude 0º in the Royal Observatory in Greenwich (Image credit: Oli Scarff / Getty Images). These observations led to the creation of the first ...