Cygnus Cargo Ship Makes Return-to-Flight Launch for NASA Today: Watch It Live

Orbital ATK's unmanned Cygnus spacecraft is set to embark upon its return-to-flight mission tonight (Dec. 3), carrying more than 7,700 lbs. (3500 kilograms) of research materials, crew supplies and hardware for the International Space Station — and you can watch the liftoff live. The Cygnus is scheduled to launch at 5:55 p.m. EST (2255 GMT) from Cape Canaveral Air Force Station in Florida aboard a United Launch Alliance Atlas V rocket, in the first liftoff for the freighter since Orbital's