Orbital Sciences Corporation develops and manufactures small and medium-class rockets and space systems for commercial, military, and civil government customers. The company's Launch Vehicles segment develops and produces interceptor launch vehicles for missile defense systems; target launch vehicles for the development and testing of missile defense systems; and space launch vehicles for placing satellites into low-Earth orbit. Its Satellites and Space Systems segment offers communications satellites that provide cable and direct-to-home television distribution, business data network connectivity, regional mobile telephony, and other space-based communications services; and science and technology satellites that are used to conduct space-related scientific research, to carry out interplanetary and other deep-space exploration missions, to demonstrate new space technologies, to collect imagery and other remotely-sensed data, and to enable national security applications.This segment also provides various space technical services, including satellite command and data handling; attitude control and structural subsystems; and analytical, engineering, and production services for space-related science and defense programs. The company's Advanced Space Programs segment provides advanced human-rated systems that are used in Earth orbit, lunar, and other space missions; advanced launch vehicle systems, including launchers used to boost research test vehicles and platforms used to test new space technologies; and national security space systems used for national security space missions and related technology demonstration programs. It offers its products and services in the United States, Europe, Australia, and East Asia. Orbital Sciences Corporation was founded in 1982 and is headquartered in Dulles, Virginia.