The largest, most powerful launch vehicle ever built is meant to be a key part of SpaceX’s plans to send humans to Mars—and NASA’s plans to return astronauts to the moon, too

After back-to-back Starship upper stage failures, SpaceX on Tuesday again launched the world's most powerful rocket, but faced new problems.

SpaceX's Starship conducted its ninth test flight Tuesday evening, successfully surpassing the outcomes of two prior test flights that ended in explosions. However, the company lost control of the spacecraft midway through its journey.