The Prime Meridian passes through Greenwich, England. The original Royal Observatory, today's Flamsteed House, commemorates the establishment of the Prime Meridian with a museum and official denotations on the ground and, at night, in the sky of the line itself.
The Prime Meridian, as established by international treaty in 1884, is the official line marking 0 degrees longitude. The location of the Prime Meridian establishes the worldwide navigational starting point as well as dividing time zones. Greenwich Mean Time sets the convention for all global time measurements.
Prior to the establishment of the Prime Meridian, countries set their own navigational standards heedless of what their neighboring nations were using. For instance, China at one point used Beijing as their first meridian.Learn More
The prime meridian is internationally recognized as the longitude of the Royal Observatory at Greenwich near London, England, because of the influence of the United Kingdom in the 1800s. This location was selected at an international conference in 1884 by a vote of 22 out of 25 countries.Full Answer >
Halfway between the prime meridian and the 180-degree longitude line is a 90-degree longitude line. There are two 90-degree meridians (lines of longitude), one in each hemisphere.Full Answer >
According to About.com, the Tropic of Cancer is a line of latitude that runs through the Northern Hemisphere, 23.5 degrees north of the equator. Because it encircles the earth, the line also is found in the Eastern and Western Hemispheres.Full Answer >
The Tropic of Capricorn passes through the countries of Australia, Chile, Brazil and South Africa. Brazil is the only country through which both the equator and a tropic travel. The Tropic of Capricorn largely passes through water.Full Answer >