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Scientists have seen something amazing in space for the first time. They saw gravitational waves. These are waves in space that are similar to ripples in water. They move outwards from the centre. Gravitational waves start when giant space objects hit each other. Albert Einstein first spoke about waves in space in 1916 in his General Theory of Relativity. One hundred years later, the researchers have proved Einstein was right. The researchers used powerful technology to see the waves. Einstein did not have this technology. He used his genius to predict the waves existed.
The discovery of gravitational waves is one of the most important discoveries ever. A scientist from Arizona State University said it was as important as the invention of the telescope. It will let scientists see many new things in space and answer questions about our universe. The scientist said: "It has opened a new window on the universe." He added that: "Using gravitational waves to explore the universe will allow us to see things we could have never seen before." He said it was beautiful that the discovery happened 100 years after Einstein's prediction.
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