Which city does the prime meridian pass through London...

The prime meridian is also known as the "first meridian" or "zero meridian", and the formulation and use of the prime meridian is a result of changes.

Prior to the 19th century, many countries adopted the meridian route through Hierro Island, a Canary Islands in the Atlantic Ocean. That meridian corresponds to today's 17°39 46 west longitude. In the first half of the 19th century, many countries used the meridian passing through their main observatories as the prime meridian.

As a result, there were several prime meridians in the world at the same time, which brought many inconveniences to later navigation and geodetic surveys. Therefore, on October 13, 1884, the International Conference of Astronomers held in Washington, D.C., decided to use the meridian passing through Greenwich, southeast of London, England, as the prime meridian as the starting point for calculating geography and the world's standard "time zone". Later, this day was designated as International Standard Time Day.

The longitude value starts from the prime meridian and is measured to the east and west, respectively, at 0°-180° or 0-12° respectively. The east of the prime meridian is east longitude and the west is west longitude, and the global longitude measurement is based on the intersection point e of the prime meridian and the equator as the longitude origin. After 1957, the Greenwich Observatory moved to the site of the observatory, and several observatories with good long-term stability were used internationally to maintain the longitude origin, and the original longitude of these observatories was used to reverse the longitude origin of their respective longitude.

The point that is the origin of the global longitude is determined and maintained by the difference between the mean of these longitude origins and the difference between point e. In 1968, the origin of the International Agreement (CIO) was used as the origin of the Earth's poles, and the meridian passing through the origin of the International Agreement and the origin of the longitude of the average observatory was called the "prime meridian". The longitude zeros of the earth coordinate system determined by various new technologies are as consistent as possible with the prime meridian, but there is often a zero difference of less than 1.

The prime meridian passes through London, England. The line also passes through eight countries, including the United Kingdom, France, Spain, Algeria, Mali, Burkina Faso, Togo and Ghana.

The prime meridian refers to the meridian on the earth that connects the north and south poles. The prime meridian, the zero degree meridian on the earth, the meridian indicates the north-south direction, all the meridians are equal in length, and the degree marked by the meridian is the longitude.

Internationally, the longitude at the original site of the Greenwich Observatory in London, England is called the 0° meridian, which is what we call the prime meridian.

The Greenwich Observatory, where the prime meridian is located, is located in London, England, in the Royal Greenwich Gardens on the banks of the River Thames in London, England, and is a world-famous comprehensive observatory.

The world-famous Greenwich Observatory was built in 1675, this observatory was created because the British navigation industry was very developed at that time, in order to solve the need to determine longitude at sea, the British authorities decided to establish an observatory in the southeast suburbs of London about 20 kilometers away from the city center, that is, in the Royal Greenwich Gardens on the banks of the Thames, which was very advanced at that time.

In 1851, the royal astronomer Airy set up a mesosphere at the Greenwich Observatory to determine the Greenwich meridian.

Origin and Reason: The world-famous Greenwich Observatory was built in 1675. At that time, the development of British seafaring was very fast.

In order to solve the need to measure longitude at sea, the British authorities decided to build an observatory in the Royal Greenwich Gardens on the banks of the River Thames, about 20 kilometers from the city center in the southeastern suburbs of London.

After 1835, the Greenwich Observatory was expanded and updated under the leadership of the brilliant astronomer Eri. He pioneered the use of the "meridian ring" to determine Greenwich Mean Solar Time. It became the most advanced astronomical observatory in the world at that time.

With the development of the world's maritime industry, many countries have established observatories to measure local time.

Internationally, in order to coordinate the measurement of time and determine the geographical longitude, the International Longitude Conference was held in Washington in 1884. It was decided to adopt the meridian of the Greenwich Observatory at that time as the standard reference meridian for the measurement of global time and longitude, called the 0° meridian or prime meridian.

Analysis] Memorizing the position of the prime meridian is the key to solving the problem. The prime meridian, or 0 degrees of longitude, is a meridian located at the Greenwich Observatory in the United Kingdom. The east and west sides of the prime meridian are designated as east and west longitudes, respectively, and meet the 180-degree meridian.

The city through which the prime meridian passes is London. Therefore D is correct and ABC is false. 【Answer】d

In 1423, the Duke of Gloucester, Heng Tianlei, built Greenwich Park and built the Greenwich Observatory on the hill by the river.

The watchtower was built, and later the Royal Observatory of Greenwich was built. In 1694 it was built as a naval hospital, and in 1873 it was renamed the Royal Naval College. The original site of the Observatory is now part of the National Maritime Museum.

The visiting Gypsy Moth Four and the Short Shark tea schooner dock at Greenwich Pier. Greenwich, the starting point of the world's calculation of time and geographic longitude, is located 8 km southeast of central London. The terrain is precarious and scenic, as early as Greenwich, the starting point of the world's calculation of time and longitude, located 8 km southeast of central London.

The terrain here is dangerous, the scenery is beautiful, as early as the century has been built palaces, set up forts and watchtowers, a large area of mountains and forests and meadows by the royal family as a deer, eagle and hunting palace. In 1675, King Charles II decreed that the watchtower would be converted into the Greenwich Observatory. In 1884, astronomers from more than 20 countries around the world held a meeting in Washington, D.C., and officially determined that the meridian of the star in the observatory should be the zero degree longitude.

Maybe it's because it has a long history, and the status of Britain was also very high at that time, which is also the reason.

Analysis: The prime meridian is a special meridian, the longitude of the Zen crack is 0°, the east of the line is the east cover quietly, the west is the west longitude, the meridian is a meridian that passes through the old site of the Greenwich Observatory in the United Kingdom The prime meridian is a special meridian, its longitude is 0°, the east of the line is the east longitude, the west is the west longitude, the meridian is a longitude through the old site of the Greenwich Observatory in the United Kingdom, the option ACD does not meet the title Therefore, the selection: b Comments:

This question examines the position of the prime meridian and can be memorized