Audio Guide：

Gravitational lensing occurs when the gravitational force of a celestial object bends the light traveling in its path, creating an effect similar to the refraction of light as it passes through a lens. Einstein predicted this phenomenon in his general theory of relativity published in 1915. British astronomer Arthur Eddington confirmed the effect of gravitational lensing as predicted by Einstein in his observation of the total eclipse in 1915 when he observed a slight change in the position of the stars located near the edges of the Sun.