SpaceX will seek to launch its Starship rocket system again, after the first attempt was postponed on Monday.
Monday's attempt, from the southern tip of Texas, near the Mexican border, had been due to take place at any point in a two-hour launch window after 8am local time. But, the countdown was stopped with 40 seconds to go
Starship is the world's biggest and most powerful rocket system, and once it's up and running, it will be used for taking satellites into orbit.