A SpaceX Starship upper stage exploded during ramp-up to an expected engine test firing at the company's Starbase facility on the Texas Gulf Coast. It's an apparent major setback for the program.

SpaceX is still looking into what happened on Flight 9, an investigation overseen by the U.S. Federal Aviation Administration. So there was not yet an official target launch date for Starship Flight 10 — and, if there had been, it would now have to be revised after the events of Wednesday night.