O'Neill Cylinder

An O'Neill Cylinder is a hypothetical space habitat designed to support human life in orbit. It consists of a large, rotating cylindrical structure that simulates gravity through centrifugal force, with interior surfaces resembling Earth's environment—including land, water, and atmosphere. This design allows for a self-sustaining, spacious living space capable of housing thousands of people, providing a potential future solution for human settlement beyond Earth. The concept addresses challenges of life support, radiation protection, and ecological balance in space, aiming to create a safe and sustainable environment for long-term human habitation.