Satellite Communication
Have you looked up at the sky on a cloudless clear night? What do you see there high up in the sky ? There are millions of stars hiding the secrets of the universe. A mong them , if you look at the sky very carefully for sometime , you can see blinking stars moving from north to south tom north and you will understand that that their? Why are they moving so fast? They are man made stars, they are called artificial satellites.
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