Gravitational lensing occurs when the gravity of a massive object, like a galaxy, warps the fabric of spacetime, bending the light from a more distant background object.

The Euclid Space Telescope has captured a remarkable image showing an extremely rare phenomenon: a ring of light around the center of a galaxy, known as an Einstein Ring. These structures appear in telescope images due to the distorting effects of gravity, and they allow researchers to study distant galaxies which might otherwise be insibile.