SpaceX Starship Launch Aborted on the Pad at the Last Moment

SpaceX's mega Starship rocket came within a second or so from blasting off on a test flight Thursday, but some of the engines failed to ignite, triggering a launch abort amid billowing clouds of smoke and vapor.

Elon Musk, the company's founder and CEO, said two engines will be replaced "to be confident of a good flight" before sending Starship from Texas on a space-skimming journey halfway around the world. It will be the 13th flight for Starship, which at 407 feet (124 meters) tall with 33 main engines is the world's biggest and most powerful rocket.

SpaceX's launch webcast showed the start of engine ignition three seconds before the planned liftoff, viewed from a drone high above the pad. Although the company did not elaborate, onscreen data showed four engines not firing, with the remaining 29 engines immediately shutting down and keeping the rocket anchored to the pad. It was the first time a full-scale Starship experienced a last-second abort like this.

The launch team immediately began draining the fuel from the rocket.

"Most probable launch timing is early next week," Musk said via X.

Neither the first-stage booster nor spacecraft were meant to be recovered, with both ending up in the sea.

Both companies need to have their landers -- Starship and Blue Moon -- ready to fly by next year so that the newly named Artemis III crew can practice docking their capsule with them in orbit around Earth. The mission after that -- Artemis IV planned for no earlier than 2028 -- would use one of those landers to take two astronauts to the moon's south polar region.