The Planetary Sunshade Foundation is conducting research, funded by the UK's Advanced Research and Invention Agency, to evaluate the feasibility and potential climate benefits and risks of space-based solar reflectors—an approach that could temporarily and controllably reduce incoming sunlight to limit global temperature rise. Specifically, we are working with NCAR to evaluate six different engineering architectures which have unique climate characteristics. In this talk, we will describe the six architectures and share initial feasibility findings. Our aim is to equip the wider climate science community with a grounded assessment of how  space capabilities might contribute to reflecting sunlight.