Watch the Falcon Heavy roar to life

SpaceX scrubbed the launch of its next Starship test rocket Friday afternoon, and the the next opportunity for the atmospheric test flight is now expected Tuesday. SpaceX plans to launch and land the rocket at company’s South Texas development complex after losing three previous prototypes in explosions.

An engine failure that cut short the first test flight of Virgin Orbit’s air-dropped LauncherOne rocket in May was caused by a faulty propellant feed line, the company’s CEO said this week.

Running through a practice countdown and hold-down engine firing at NASA’s Kennedy Space Center, a SpaceX Falcon 9 rocket passed a key checkpoint Thursday ahead of liftoff next week with the U.S. Air Force’s fifth X-37B spaceplane flight, a mission that will come with several firsts.