The aircraft called the Solar Impulse began a potentially historic flight on May 24. Flying from Switzerland to Morocco, the plane made its first and only pit stop in Madrid on May 25, before embarking on a 1,550 mile journey that was the longest recorded for any aircraft completely powered by green energy.

The Solar Impulse had its first flight between Paris and Brussels in 2011, according to Agence France-Presse. The plane was also the first manned airplane to use solar power.

While having the same wingspan as a contemporary commercial airplane, is equipped with 12,000 solar cells that power its four electric engines.

The plane's solar panel design and technology has the capacity to be further evolved in the future of air transportation, although the Solar Impulse only carried a single pilot.

"This confirms our confidence in the capacity of solar energy even further," said pilot Andre Borschberg, upon landing in Madrid. 

In 2014, the Solar Impulse is planned to circumnavigate the globe, according to AFP.