Scientists have seen something amazing in space for the first time. They saw gravitational waves(引力波). These are waves in space that are like waves in water. They move outwards from the centre. Gravitational waves start when very big space things hit each other. Albert Einstein first spoke about waves in space in 1916 in his General Theory of Relativity(广义相对论). 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 super head to predict that the waves were outside in the space.
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 study 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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