Within the project of a habitation module for the future Lunar Gateway space station by Thales Alenia Space Italy, this thesis investigates the design of a cover for thermal protection of the docking ports of the module. As thermal control of the module is performed by means of heaters, the prolonged exposition of the module to the space environment during its transfer flight towards cis-lunar orbit translates into a significant impact on the power budget, which needs to be supplied either by means of batteries or by augmented power generation capabilities. A passive solution is therefore prompted, and investigated in this thesis in a jettisonable configuration, to detach prior to docking to the orbiting space station.