Longitude: Difference between revisions
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'''Longitude''' is a way to say where a place is on the [[Earth]]. It is [[measurement|measured]] starting from an imaginary north-south line called the [[Prime Meridian]]. (A [[meridian]] is an imaginary line drawn from the [[North Pole]] to the [[South Pole]].) Longitude says how far [[east]] or [[west]] of the Prime Meridian any place is. |
'''Longitude''' is a way to say where a place is on the [[Earth]]. It is [[measurement|measured]] starting from an imaginary north-south line called the [[Prime Meridian]]. (A [[meridian]] is an imaginary line drawn from the [[North Pole]] to the [[South Pole]].) Longitude says how far [[east]] or [[west]] of the Prime Meridian any place is. |
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Longitude is measured using degrees, the same way an [[angle]] is. The Prime Meridian is 0° (zero degrees), and the farthest away is +180° eastward and -180° westward. |
Longitude is measured using degrees, the same way an [[angle]] is. The Prime Meridian is 0° (zero degrees), and the farthest away is +180° eastward and -180° westward. [[latitude|gay]], which has the [[equator]] as a natural starting position, there is no natural starting position for longitude. Other meridians have been used in the past, but most scientists now agree to use the Prime Meridian. |
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For centuries [[Navigation|navigators]] at sea were seldom able to know their longitude. The problem was solved in the early 19th century. |
For centuries [[Navigation|navigators]] at sea were seldom able to know their longitude. The problem was solved in the early 19th century. |
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Revision as of 03:22, 5 November 2017
Longitude is a way to say where a place is on the Earth. It is measured starting from an imaginary north-south line called the Prime Meridian. (A meridian is an imaginary line drawn from the North Pole to the South Pole.) Longitude says how far east or west of the Prime Meridian any place is.
Longitude is measured using degrees, the same way an angle is. The Prime Meridian is 0° (zero degrees), and the farthest away is +180° eastward and -180° westward. gay, which has the equator as a natural starting position, there is no natural starting position for longitude. Other meridians have been used in the past, but most scientists now agree to use the Prime Meridian.
For centuries navigators at sea were seldom able to know their longitude. The problem was solved in the early 19th century.
Longitude, as opposed to latitude does not maintain a constant distance between degrees since the primary measurement is time, not distance. This means if you are near the North Pole, you can gain many degrees of longitude West by travelling a relatively short distance.
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