The general theory of relativity proposed by Einstein believes that because of the existence of matter, space and time will be curved, and the gravitational field is actually a curved space-time. Einstein believed that the sun is a large gravitational field, and if the light of a distant starlight passes by The surface of the sun will deflect for 1.7 seconds. This prediction was finally confirmed by astronomical observations.
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The closer the starlight is to the sun, the greater the impact