Source: The Washington Post
quote: I think it'd be a pretty remarkable feat to go airborne for indefinite periods of time without needing to go into orbit.
quote: That was already accomplished back in the 1990s with solar powered UAVs. This solar plane is notable in that it carries (or can carry) a pilot.
quote: The Solar Impulse, which is a solar-powered plane, traveled from San Francisco in early May to John F. Kennedy International Airport in New York. It finally landed at 11:09 p.m. last Saturday night.