What is "sky-sailor"

The Sky-Sailor is a plane that contains solar cells on its wings, developed by the Swiss Federal Institute of Technology in Zurich. It is hoped it will be able to search the Martian surface and even send pictures back to Earth. The reason the Sky-Sailor would have a bigger advantage over other Martian rovers is because it can scan the Martian surface without touching it at any point, which removes many hazards and high energy costs. If this project goes on successfully, it should be able to take detailed pictures of Mars, especially in places where NASA's rovers, Spirit and Opportunity, cannot go.