SpaceX has launched its biggest, most powerful Starship yet. The rocket blasted off from the southern tip of Texas on Friday, carrying 20 mock Starlink satellites on a test flight extending halfway around the world. Nothing is being recovered. It’s the 12th test flight of the rocket that Elon Musk is building to get people to Mars one day. But first comes the moon and NASA’s Artemis astronaut program. SpaceX’s newest Starship model made its debut two days after Musk announced he’s taking his company public.