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The aim of this article is to make the fundamental knowledge about gravitational waves that Albert Einstein predicted the existance in general theory of relativity a hundred years ago. Scientists have believed that gravitational waves exist, until recently they have directly detected in the first time and a few month later they have detected for the second time. The both discoveries of gravitational waves came from the collision and merger of two black holes. This discoveries change the universe knowledge completely and learn to understand the universe in a new point of view that they haven’t studied before. Considered to be the opening a new window into studying the universe actually.
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