SpaceX launched its biggest, most powerful Starship yet on a test flight Friday, an upgraded version that NASA is counting on to land astronauts on the moon.

The redesigned mega rocket made its debut two days after SpaceX CEO Elon Musk announced he's taking the company public. It blasted off from the southern tip of Texas, carrying 20 mock Starlink satellites for release halfway around the world.

It's the 12th test flight of the rocket that Musk is building to get people to Mars one day. But first comes the moon and NASA's Artemis programme.