A solar-powered airplane landed in California on Sunday, completing a trip across the Pacific Ocean that began last year. A team of pilots and scientists are attempting to fly the airplane, called Solar Impulse 2, all the way around the world. In March 2015, pilot Bertrand Piccard flew from Japan to Hawaii. The flight that took five days and five nights. Piccard set a new record for solo flight, but the trip damaged the plane’s batteries. After more than nine months of repair work, Solar Impulse 2 is ready to complete its journey around the world. Because it gets all its power from the sun, the plane can only fly in very clear conditions. Still, its pilots plan to finish the trip by the end of this summer.