The flight is a first for the aircraft, which made its maiden voyage in 2009. The plane completed a non-stop 26-hour flight that proved that the plane can stay aloft at night.
Back in April, it was reported that the flight would occur on May 2nd. At the time, the team was concerned about crossing international air networks and was awaiting final approval from authorities.
The plane, amazingly, has the wingspan of a Boeing 777.
WATCH the flight take off earlier on Friday below. (Hint: It's super cool to watch.)
And check out photos of the aircraft below.
Solar Impulse Makes First International Flight (VIDEO, PHOTOS)
Solar Impulse's maiden voyage.
(AP Photo/Christian Hartmann, pool)
(AP Photo/Denis Balibouse,Pool)
(AP Photo/Keystone/Denis Balibouse/Pool)
Pilot Andre Borschberg gives a thumb up prior to take off. (AP Photo/Keystone/Fabrice Coffrini/Pool)
(AP Photo/Keystone, Denis Balibouse, Pool)
The airplane stands on the runway after its first successful night flight attempt at Payerne airport, Thursday, July 8, 2010. (AP Photo/Keystone, Denis Balibouse, Pool)
Solar Impulse's Chief Executive Officer and pilot Andre Borschberg flies in the solar-powered HB-SIA prototype airplane during its first successful night flight attempt at Payerne airport, Thursday, July 8, 2010. The aircraft took off July 7 at 06:51 am and reached an altitude of 28,543 feet by the end of the day.