The Defense Advanced Research Projects Agency (DARPA) awarded Dulles, Va.-based Orbital Sciences Corp. a $75 million contract to develop the final design for a radically new space architecture in which traditional, large spacecraft are replaced by clusters of wirelessly connected orbiting modules. Dubbed System F6, short for Future, Fast, Flexible, Fractionated, Free-Flying spacecraft, Orbital’s design was selected among four competing study contracts issued in 2008 and 2009, according to a Dec. 18 company news release. The new contract is valued at $74.6 million over a one-year period. Gregg Burgess, Orbital’s vice president for national security systems in the company’s Advanced...