Zephyr, the solar-powered, unmanned aircraft, spent 18 days in the stratosphere during a test flight. Photo: Airbus
Zephyr, the solar-powered, unmanned aircraft, spent 18 days in the stratosphere during a test flight. Photo: Airbus
Solar-powered Airbus Zephyr completes 18-day test flight
Aerospace group hopes the Zephyr can remain airborne for up to six months in the future
