The latest SpaceX launch of Starship, the largest rocket ever built, has been postponed. The company, which was founded by Elon Musk, was gearing up to again attempt a successful launch of its ...

The countdown got down to the 40-second mark, but it was halted because of issues with the 403-foot rocket, the world’s largest and most powerful. Starship was supposed to blast off from the ...

This story has been changed to clarify that it is the world's largest single-segment solid rocket. China says it fired up the world’s largest single-segment solid-fuel rocket engine for the ...