The company will try to catch the giant booster of its moon and Mars rocket for a second time on Tuesday afternoon.

SpaceX is poised for its next Starship megarocket test flight on Tuesday, with US President-elect Donald Trump expected to witness the second ever attempt to catch its descending booster stage in the launch tower's "chopstick" arms.

Most importantly, SpaceX will attempt to briefly reignite one of Starship's six Raptor engines in space. SpaceX tried this on Starship's third launch in March but aborted the engine restart after the rocket lost roll control during the flight's coast phase.