The other two important parallels lay 66 ½ degrees north and south of the Equator. They mark the beginning of the Arctic Circle in the north and the Arctic Circle n the south.
As we have already learnt, the most important line of latitude is the Equator which divides the world into two equal parts-North and south. There are two other parallels that are quite as important. They both lie at 231/2 degrees north and south of the Equator.
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The 23 ½ degrees parallel to the north is called the Tropic of cancer. In India it passes through the Rann of Kutch in the west and a point near Calcutta in the east. The tropic of Capricorn is the 23 ½ is the 23 ½ parallel to the south. It passes through North Australia, South Africa and the middle of the South America.
Now what do we mean by the word tropic? It means turning point. Only places between the two tropics get the direct overhead rays of the sun at some time of the year. The climate here is therefore very hot, that is, they have a tropical climate. The places north of the tropic of cancer and south of the Tropic of Capricorn only get the slanting not very hot, that is, they are said to have a temperate climate.
The other two important parallels lay 66 ½ degrees north and south of the Equator. They mark the beginning of the Arctic Circle in the north and the Arctic Circle n the south. During some seasons of the year, a person standing at the poles would not be able to see the sun at all during the day, and at other times, the sun can be seen shining even at night, Within the Arctic and Antarctic Circles, there is at least one day in the year when the sun never sets and another on which it never rises. At the poles themselves, there is six months of total darkness and six months daylight.