An airplane powered totally by the sun landed in Seville, Spain early Thursday after completing a 71-hour flight across the Atlantic Ocean. The plane, a Solar Impulse 2 model, has just one seat. It left from John F. Kennedy International Airport in New York Monday morning. This was the plane’s 15th stop in its planned around-the-world trip. The trip began in Abu Dhabi in March of 2015. Swiss aviator Bertrand Piccard operated the solar-powered plane on this leg of the tour. The Solar Pulse 2 had an average speed of 70 kilometers an hour during his flight. The plane’s power comes from 17,000 solar cells built into the wings. The cells capture the sun’s energy, which is stored in batteries on the plane. The Solar Pulse 2 has a 72-meter wingspan. That is longer than the wingspan of a Boeing 747 passenger plane.