Photos: Atlas 5 rocket soars

A billion-dollar missile warning satellite built by Lockheed Martin for the U.S. Space Force arrived at Cape Canaveral earlier this month to kick off final preparations for launch May 17 aboard a United Launch Alliance Atlas 5 rocket.

Virgin Orbit could attempt its first orbital test launch later this month over the Pacific Ocean southwest of Los Angeles, capping a development program for an air-launched small satellite carrier that began in earnest eight years ago.

SpaceX test-fired a Falcon 9 rocket at Cape Canaveral Friday evening, igniting nine Merlin engines for several seconds while hold-down restraints kept the launcher on the ground. The company also confirmed the rocket is scheduled for takeoff Wednesday on a space station resupply mission, three days later than previously planned.