Ferro, the westernmost of these, is still sometimes found as the prime meridian in German maps.
But it is our simple duty, in our present judicial capacity, to examine the question of a prime meridian from all points of view.
You have met to discuss and consider the important question of a prime meridian for all nations.
The prime meridian runs somewhat to the west of the Island of Fayal.
The prime meridian of the heavens passes through this point.
From this prime meridian longitude is calculated, which means that any given locality is so many degrees east or west of it.
The prime meridian is made to pass through the Azores Islands.
In the practical work of determining longitudes a connection with the prime meridian cannot be made in each case.
We may then say that, from a purely scientific point of view, any meridian may be taken as the prime meridian.
We must know how far other places are from the prime meridian, and for that reason it is necessary that it should be on land.
The meridian with a longitude of 0°, adopted officially in 1884 as a reference line from which longitude east and west are measured and as a basis for standardized time zones. It passes through Greenwich, England, the site of the Royal Greenwich Observatory, which was founded in 1675 and which closed except as a museum in 1998. The prime meridian, together with its opposite meridian having a longitude of 180°, divide the Earth roughly into the Eastern and Western Hemispheres, with those portions of the British Isles, Europe, and Africa that lie west of the prime meridian, considered for practical purposes as belonging to the Eastern Hemisphere. See illustration at time zone.