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Greenwich, LondonThe Prime Meridian of the World
2D Wong Tsz Hin Donald (32)
A prime meridian is a line of longitude, at which longitude is defined to be 0°. A prime meridian and its opposite in a 360°-system, at 180° longitude form a great circle. This great circle divides the Earth, into two hemispheres. If one uses directions of East and West from a defined prime meridian, they can then be called Eastern Hemisphere and Western Hemisphere. A prime meridian is finally random, unlike an equator, which is determined by the axis of rotation — and various conventions have been used or encouraged in different regions and throughout history.
Royal Observatory, Greenwich
What is Prime Meridian?
The Prime Meridian is connected eight countries which are Britain, France, Spain, Algeria, Mali, etc.
The longitude of Greenwich is 00
There is a line of Prime Meridian in the Royal Observatory in Greenwich
The info of Prime Meridian
Why does the Prime Meridian set up at
Greenwich?
The reason for the Prime Meridian sets up at Greenwich is that finder of Prime Meridian is born in Greenwich. Therefore, Greenwich is used to be the centralization of the Prime Meridian. In 1884, the International Meridian Conference was held in Washington, the Greenwich was also elected to be the Prime Meridian for most of the countries in the world. Finally, Greenwich became the Centre of Longitude, which is also known as the Prime Meridian.
Prime Meridian
Greenwich
Royal Observatory
where
In 1884
International Meridian Conference
when whatThe 0o
longitude
How long
It is start from north polar to south polar
My reflection I want to go to the Royal Observatory in Greenwich because
their government use a line to divide it into two hemispheres. Thus I can step onto the two hemispheres at one time. If I go there, I can learn more about Prime Meridian, especially at the method of measurement at Prime Meridian.
Rio de Janeiro 43° 10′ 19″ W
Hong Kong 114° 10' 0" E
Some Countries’ longitude
Jerusalem 35° 13′ 47.1″ E
Florence 11°15′ E
Rome 12° 27′ 08.4″ E
New York 74° 0' 23" W
Tokyo 139° 45' 5" E
Greenwich 0 ° 00’ 00” W
West
HemisphereEast Hemisphere
Sources of Materials
http://en.wikipedia.org/wiki/Prime_meridian
http://en.wikipedia.org/wiki/Prime_meridian_(Greenwich)
http://education.nationalgeographic.com/education/encyclopedia/prime-meridian/?ar_a=1