Space Colonies: The O'Neill Cylinder

The O'Neill Cylinder is a space colony designed by Gerard K. O'Neill that consists of a cylinder split into 6 parts. 3 of the 6 of these parts are pieces of land. The other 3 are windows. The entire cylinder is facing the sun. The windows have mirrors tilted away from the cylinder at 45 degree angles to let sunlight into the cylinder. The cylinder is always spinning fast enough to create the feeling of 1 g on the inside. Each cylinder can hold about 1,000,000 people sustainably. If these cylinders were more than just designs, I believe that they could have the power to change the world. Thanks, Aidan.