Centaur Stage Mounted Atop Atlas V

At Cape Canaveral Air Force Station in Florida, a United Launch Alliance (ULA) centaur stage is mounted atop a ULA Atlas V rocket at Launch Complex 41. The launch vehicle will boost the Orbital ATK Cygnus OA-4 spacecraft on a commercial resupply services mission to the International Space Station. The spacecraft deliver more than 7,000 pounds of supplies, equipment and scientific research materials that improve life on Earth and drive progress toward future space exploration.

Photo credit: NASA/Dimitri Gerondidakis