The United Launch Alliance Atlas V rocket and Orbital ATK Cygnus spacecraft stack has been rolled to the launch pad at Space Launch Complex 41 at Cape Canaveral Air Force Station ahead of tomorrow’s liftoff. Launch time is 11:05 p.m. EDT at the start of a 30-minute window. The mission calls for the Cygnus to deliver more than 3 1/2 tons of experiments and supplies to the International Space Station where astronauts will help conduct research to improve life on Earth and prep NASA for a journey to Mars by future astronauts. Photo credit: NASA/Ben Smegelsky