Since the earth is a sphere (a ball), you can reach any country in the world by
heading west from the Prime Meridian.
The earth is often regarded in terms of the two Hemispheres, each beginning at the
Prime Merridian and extensing 180 degrees in longitude from it.
The countries in the western Hemisphere include all of North America, South America,
Iceland, Greenland, Portugal, and Ireland, as well as all or part of a number of
African countries, the UK, Spain, and France.
Eastern hemisphere.
The prime meridian is designated as 0 degrees longitude, dividing Earth into the Eastern and Western Hemispheres.
This is called the Prime meridian, it passes through Greenwich, England.
The distance in degrees from the prime meridian to 90 degrees East is 90 degrees. This means that 90 degrees East is located directly on the opposite side of the Earth from the prime meridian, which is at 0 degrees.
The International Date Line combined with the Prime Meridian makes a complete circle around the Earth. The Prime Meridian is at 0 degrees longitude, and the International Date Line is opposite it at 180 degrees longitude.
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eastern hemisphers
... Eastern Hemisphere
The Eastern hemisphere
Eastern hemisphere.
All places on Earth west from Prime Meridian to 180 degree are in the western hemisphere.
The prime meridian is designated as 0 degrees longitude, dividing Earth into the Eastern and Western Hemispheres.
They are the axes of the coordinate system that is used for places on the earth's surface. Every point on the earth's surface is a certain number of degrees east or west of the prime meridian (its longitude) and a certain number of degrees north or south of the equator (its latitude).
This is called the Prime meridian, it passes through Greenwich, England.
The distance in degrees from the prime meridian to 90 degrees East is 90 degrees. This means that 90 degrees East is located directly on the opposite side of the Earth from the prime meridian, which is at 0 degrees.
The International Date Line combined with the Prime Meridian makes a complete circle around the Earth. The Prime Meridian is at 0 degrees longitude, and the International Date Line is opposite it at 180 degrees longitude.
The Prime Meridian is east of France. The Prime Meridian is located in Greenwich, England. This is the location on earth where the longitude coordinate is 0 degrees.