An experimental solar-powered plane landed safely Thursday after completing its first 24-hour test flight, proving that the aircraft can collect enough energy from the sun during the day to stay aloft all night.
Pilot Andre Borschberg eased the Solar Impulse aircraft onto the runway at Payerne airfield about 31 miles (50 kilometers) southwest of the Swiss capital Bern at exactly 9 a.m. (0700 GMT; 3 a.m. EDT) Thursday.
Helpers rushed to stabilize the pioneering plane as it touched down, ensuring that its massive 207-foot (63-meter) wingspan didn't touch the ground and topple the craft.
The record feat completes seven years of planning and brings …
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