Orbital Sciences Corporation (NYSE: ORB), one of the world's leading space technology companies, today announced it successfully launched its Antares(TM) medium-class rocket carrying the first of eight Cygnus(TM) cargo logistics spacecraft missions to the International Space Station (ISS) as part of its $1.9 billion Commercial Resupply Services (CRS) contract with NASA. The launch of Orbital's Antares rocket and Cygnus cargo logistics spacecraft will culminate in rendezvous and berthing with the ISS on Sunday, January 12 at approximately 6:00 a.m. (EST). Cygnus will deliver approximately 2,780 lbs. (1,260 kg.) of cargo to the Expedition 38 astronauts and remain attached to the station until February 18 before departing with approximately 2,800 lbs. (1,300 kg.) of disposable cargo for a safe, destructive reentry over the Pacific Ocean.