The curvature of space-time
The bending of light in space, according to the general theory of relativity, is caused by the curvature of space-time.
Explanation:
While light travels in a straight line, in space its path is usually distorted by gravity, which is the effect of the warping of space-time fabric. This is especially apparent when light passes close to very large astronomical bodies like black holes with massive gravity. The bending of light even allows astrologists to view object behind a celestial body in a phenomenon is called gravitational lensing.
Learn More:
For more on gravitational lensing check out;
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