After flying across four continents, three seas, two oceans and covering 26,098 miles, Solar Impulse 2 finished its trip around the world on July 26 in Abu Dhabi, the same city where the journey began on March 9, 2015. Bertrand Piccard, who has alternated piloting duties with Andre Borschberg, made the landing.
The Solar Impulse 2, as its name implies, is a solar-powered plane. Its wings, which stretch 236 feet tip to tip, are covered by 17,000 solar cells that provide energy for the plane's four electric motors. The plane no heavier than a car, but has the wingspan of a Boeing 747, according to the BBC. The global flight was intended to highlight how clean energy can work as a power source for transportation needs, a goal largely proven by the nearly five-day flight across the Pacific Ocean from Nagoya, Japan, to Kalaeloa, Hawaii. That leg netted Borschberg the world record for the longest uninterrupted solo flight.
As for what's next for Solar Impulse 2, Borschberg wrote that the plane was designed to travel 2,000 hours but has only flown for 700, so it still has plenty of time left in the air. To that end, Borschberg sees the plane contributing to more solar energy testing and to the development of unmanned solar-powered vehicles, including drones.