The huge, reusable rocket-spaceship duo that SpaceX is building to ferry people to the Red Planet and other celestial destinations will no longer be called the BFR (“Big Falcon Rocket”) and BFS (“Big Falcon Spaceship”), respectively.

“Renaming BFR to Starship,” Musk announced via Twitter.

Starship is the spaceship/upper stage & Super Heavy is the rocket booster needed to escape Earth’s deep gravity well (not needed for other planets or moons),” the billionaire entrepreneur added in another tweet.

This announcement comes on the heels of Musk indicating that previous plans to make the second stage of the Falcon 9 reusable were being scrapped in order to focus on the development of the Starship.

“Btw, SpaceX is no longer planning to upgrade Falcon 9 second stage for reusability,” he tweeted on Nov. 17. “Accelerating BFR instead. New design is very exciting! Delightfully counter-intuitive.”

While Musk did not reveal any new details about the design for the spacecraft, it is safe to say that it will resemble the updated schematics that Musk presented back in September. It was at this time, during a press conference at SpaceX headquarters in California, that Musk shared who the first passengers aboard the BFR would be – Japanese fashion innovator/art curator, Yusaku Maezawa, and a group of artists.