The Greenwich or "Prime" meridian was arbitrarily defined as 0 degrees of longitude. Longitudinal positions are measured as either east or west from Greenwich. (The French for a while had a separate system that used the Paris meridian as 0 degrees). Since a sphere - the Earth - has 360 degrees of longitude half way around the east measurements and west measurements will meet. This is at E180 degrees or W180 degrees of longitude. This is the International Date Line. So, places that are located in longitudes east of Greenwich are in the eastern hemisphere and those west of Greenwich in the western hemisphere.
There is also a geopolitical interpretation of eastern-western hemisphere as well. Look at a map and you'll see that significant portions of Africa are western hemisphere nations and that much of Europe is in the eastern. The geopolitical interpretation groups European nations (and their eastern hemisphere developed former colonies) and North and South America as Western and everybody else as Eastern. That way the western hemisphere parts of Africa are excluded from "The West" and the SE Asian outliers of Australia and New Zealand are included as "Western" nations.
The Greenwich Meridian divides the globe into eastern and western hemispheres by serving as the prime meridian, with locations to the east being in the eastern hemisphere and those to the west in the Western Hemisphere. The International Date Line, located opposite the prime meridian, serves as the line where the date changes, further dividing the globe into eastern and western hemispheres in terms of time differences.
The Prime Meridian, which runs through Greenwich, London, marks the division between the eastern and western hemispheres. Additionally, the 180th meridian, also known as the International Date Line, further separates the two hemispheres.
The Prime Meridian is the meridian (line of longitude) at which longitude is defined to be 0°. The Prime Meridian and the opposite 180th meridian (at 180° longitude), which the generally follows, form a International date line great circle that divides the Earth into the Eastern and Western Hemispheres. Unlike the parallels of latitude, which are defined by the rotational axis of the Earth (the poles being 90° and the Equator 0°), the Prime Meridian is arbitrary. By international convention, the modern Prime Meridian is one passing through Greenwich, London, United Kingdom, known as the International Meridian or Greenwich Meridian. Historically, various meridians have been used, including four different ones through Greenwich.
The Prime Meridian (0 degrees longitude) is the line that separates the eastern and western hemispheres. It runs from the North Pole to the South Pole, passing through Greenwich, London. Additionally, the 180th meridian, also known as the International Date Line, separates one calendar day from another and further divides the eastern and western hemispheres.
The Greenwich Meridian passes through Europe and Africa. It serves as the prime meridian, representing 0 degrees longitude and dividing the Eastern and Western Hemispheres.
The Prime Meridian, which runs through Greenwich, England, is the line that divides the Earth into the Eastern and Western hemispheres. Locations to the east are in the Eastern Hemisphere, while locations to the west are in the Western Hemisphere.
The Prime Meridian, which runs through Greenwich, London, marks the division between the eastern and western hemispheres. Additionally, the 180th meridian, also known as the International Date Line, further separates the two hemispheres.
The Equator devides the earth in to North and South hemispheres
The Prime Meridian is the meridian (line of longitude) at which longitude is defined to be 0°. The Prime Meridian and the opposite 180th meridian (at 180° longitude), which the generally follows, form a International date line great circle that divides the Earth into the Eastern and Western Hemispheres. Unlike the parallels of latitude, which are defined by the rotational axis of the Earth (the poles being 90° and the Equator 0°), the Prime Meridian is arbitrary. By international convention, the modern Prime Meridian is one passing through Greenwich, London, United Kingdom, known as the International Meridian or Greenwich Meridian. Historically, various meridians have been used, including four different ones through Greenwich.
Iran is north of the Equator and east of the Greenwich meridian, so it is in the Northern Hemisphere and also the Eastern Hemisphere.
The Prime Meridian (0 degrees longitude) is the line that separates the eastern and western hemispheres. It runs from the North Pole to the South Pole, passing through Greenwich, London. Additionally, the 180th meridian, also known as the International Date Line, separates one calendar day from another and further divides the eastern and western hemispheres.
The Greenwich Meridian passes through Europe and Africa. It serves as the prime meridian, representing 0 degrees longitude and dividing the Eastern and Western Hemispheres.
The Prime Meridian, which runs through Greenwich, England, is the line that divides the Earth into the Eastern and Western hemispheres. Locations to the east are in the Eastern Hemisphere, while locations to the west are in the Western Hemisphere.
The imaginary line that divides the Earth into eastern and western hemispheres is the Prime Meridian, which runs through Greenwich, England. This line serves as the 0° line of longitude and separates the Eastern Hemisphere (to the east of the Prime Meridian) from the Western Hemisphere (to the west of the Prime Meridian).
-- Origin of longitude -- Zero degrees longitude -- Boundary between Eastern and Western Hemispheres -- Greenwich Meridian
The earth is divided into eastern and western hemispheres by the Prime Meridian. The Prime Meridian is zero longitude, and is a line that runs from pole to pole and passes through the Greenwich Observatory at Greenwich, London, Britain.
Eastern and Western
The Prime Meridian and its opposite the 180th meridian (at 180° longitude), which the International Date Line.