L-5 is a proposed space habitat design that aims to create a permanent human settlement in space. It is located at the Lagrange Point 5, one of five points in space where the gravitational forces of the Earth and the Moon balance with the centrifugal force of an object in orbit. This location allows for stable positioning, making it ideal for a space colony. The L-5 design envisions a rotating cylindrical structure that simulates gravity through centrifugal force. This habitat would provide living and working spaces for astronauts, scientists, and their families, promoting long-term human presence in space and supporting research and exploration efforts.