Gravity lensing lets us map the distribution of both visible and dark matter.

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Gravity lensing occurs when the gravitational pull of a massive object, such as a galaxy or a cluster of galaxies, bends the light from more distant objects behind it, causing them to appear distorted or magnified. By studying these distortions and magnifications, astronomers can map the distribution of both visible and dark matter in the lensing object. Gravity lensing occurs when light passing by a massive object is bent, which can allow us to map the distribution of all matter, including dark matter, in the universe.

Gravity Lensing Lets Us Map the Distribution of Both Visible