The need for sustainable, CO2-emission free transportation is more urgent than ever. Replacing rocket launched satellites by emission free unmanned aircraft, is a leap towards this goal. We aim to replace conventional space satellites by solar-powered atmospheric unmanned aircrafts with zero greenhouse gas emissions and with drastically lowered resource consumption. The aircraft would not only greatly reduce manufacturing and launching costs, but also help our society to understand the importance of efficiency and sustainability in aviation: to create a greener future.