Solar Impulse 2 aircraft readying for 5,000 mile trip without gas
Monday, May 25, 2015 - 12:00
in Astronomy & Space
Amy R. ConnollyNANJING, China, May 25 (UPI) -- The Solar Impulse 2, a completely solar-powered aircraft, is set to make its most difficult leg of its around-the-world journey.