The other half of SpaceX’s Starship deep-space transportation system is starting to come out into the light.

Over the past three months, three full-size prototypes of the 165-foot-tall (50 meters) Starship spacecraft have launched on high-altitude test flights, each time with impressive but ultimately explosive results. However, the company hadn’t showcased any versions of Super Heavy, the 230-foot-tall (70 m) booster that will launch Starship off Earth — until now.