SpaceX has launched its Starship mega rocket again after back-to-back explosions. The goal is to make it through the entire test flight and release a series of mock satellites. The most powerful rocket ever built blasted off Tuesday evening from the southern tip of Texas. The spacecraft targeted a reentry halfway around the world in the Indian Ocean. There are no plans to catch the booster this time. The two previous Starship demos ended just minutes after liftoff, raining wreckage into the ocean. NASA needs SpaceX to make major strides over the next year in order to land astronauts back on the moon.