WHAT ARE LONGITUDES? To fix the position of a place, it is necessary to know something more than the latitude of that place. You can see, for example, that Tonga Islands (in the Pacific Ocean) and
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PRIME MERIDIAN Unlike parallels of latitude, all meridians are of equal length. Thus, it was difficult to number the meridians. Hence, all countries decided that the count should begin from the mer
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LONGITUDE AND TIME The best means of measuring time is by the movement of the earth, the moon, and the planets. The sun regularly rises and sets every day, and naturally, it is the best time-keeper
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WHY DO WE HAVE STANDARD TIME? The local time of places which are on different meridians is bound to differ. For example, it will be difficult to prepare a time-table for trains which cross several
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