Illustration of a manned crew exploration vehicle (CEV) preparing to dock with the proposed Lunar Orbital Platform-Gateway, a manned moon-orbiting space station. It is docking with the manned habitation module. At top is the gold foil multi-layer insulation-wrapped Power and Propulsion Element ion propulsion module. The various coloured external lights on the spacecraft are navigation aids (also known as a running or position lights) with red, green, yellow and white lights positioned on the spacecrafts' port (left), starboard (right), lower, and upper sides respectively. These lights enhance the spacecrafts' visibility as an aid for docking and other maneuvers. The plans for this space station are being led by NASA, co-ordinating between multiple space agencies.