Gravitational Lensing

Gravitational lensing is spacetime's optical illusion. A black hole's gravity is so intense it bends the very fabric of space, warping the path of light that passes nearby, like a cosmic magnifying glass.

Light from stars behind the black hole gets stretched, smeared, and sometimes duplicated into multiple images. A Perfect alignment creates an "Einstein ring", a full circle of light. Around black holes, it goes further: photons can orbit the event horizon before escaping, forming a glowing "photon ring." It's why black holes don't look like empty voids in space but rather look like warped, glowing halos, bending the universe around them.