(Dulles, VA 14 November 2007) – Orbital Sciences Corporation (NYSE: ORB), a world leader in smaller-sized civil government and national security satellites, announced today that it has been selected by the U.S. Air Force Research Laboratory's (AFRL) Space Vehicles Directorate, Kirtland Air Force Base, N.M., for a $29.5 million contract to support the execution of the Autonomous Nanosatellite Guardian for Evaluating Local Space satellite program. The ANGELS program supports the continued initiatives of AFRL's Space Vehicle Directorate to develop innovative nanosatellite technologies capable of independently providing localized space situational awareness.