SpaceX’s giant new rocket has blasted off on a second test flight from South Texas. The launch Saturday morning came seven months after the first try ended in an explosion minutes after liftoff. The company has since made dozens of improvements to the rocket and launch pad on the Gulf of Mexico. At 400 feet, Starship is the biggest and most powerful rocket ever built. The goal is to get the spacecraft high enough to circle the world, just short of a full orbit. NASA is counting on Starship to land astronauts on the moon by the end of 2025 or soon thereafter.