SPHEREx
Orbital ATK has no plans to phase out seldom-used Pegasus rocket
The build-up of Orbital ATK’s next air-launched Pegasus XL rocket will start in the coming weeks at Vandenberg Air Force Base in California, and while its flight in mid-2017 is the last Pegasus launcher on the manifest with a confirmed payload, company officials are confident the unique vehicle has a future beyond next year.