Kessler Syndrome is a theoretical scenario in which the density of objects in low Earth orbit becomes so high that collisions between satellites and space debris create a cascade effect. Each collision generates more debris, leading to further collisions and an exponential increase in space junk. This could make certain orbits unusable for future satellites. The concept was proposed by Donald J. Kessler in 1978. If Kessler Syndrome were to occur, it could severely impact space exploration, satellite communications, and global positioning systems, posing significant challenges for future missions and the safety of astronauts in space.