The new Cygnus commercial cargo ship has launched on a demonstration voyage to the International Space Station.
Built by Orbital Sciences Corporation (OSC), the robotic vessel lifted off atop an Antares rocket from the Wallops spaceport in Virginia, US.
Cygnus is one of two private systems seeded by Nasa to meet America's ISS re-supply requirements following the retirement of the space shuttles.
A successful mission will see OSC begin a series of operational cargo flights.
Nasa has awarded the company a $1.9bn (£1.2bn) contract covering eight sorties to the station.