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Обучающая телевизионная программа для детей 

 

 


ASTRONOMY

YOUR WATCH BECOMES A COMPASS

Do you know that you can use your watch as a compass on a sunny day? Look at the watch which is on your hand and point the hour-hand"1" in the direction of the sun, as you see in the picture. Imagine a line which runs from the centre of the watch through a point half-way between "2" the hour-hand and number one. This line will point south."3" If you know astronomy a little, you will understand why this works. In the northern half of the earth, the sun is in the south at noon. In our country the real noon is one o’clock."4" If at that time we point the hour-hand at the sun, the hour-hand and number one will .point south. That is why you must imagine a line which will run from the centre of the watch through a point half-way between the hour-hand and number one. It will point south. If you are in the southern part of our planet, you must point number 12 at the sun. (The angle between this number and the hour-hand will then show north.) The line which you can imagine between number twelve and the hour-hand will then show north.

1 point the hour-hand — направьте часовую стрелку 2 through a point half-way between — через точку, находящуюся на равном расстоянии между 3 to point south — указывать на юг 4 the real noon is one o’clock — в действительности полдень наступает в час дня (На территории СССР введено декретное время, переведенное на час вперед, с целью более рационального использования населением дневного света в течение суток.)                                            

 

   

   

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