The Starship, SpaceX’s human-carrying rocket, may be close to finding a landing spot on Mars.

The stainless steel behemoth, currently undergoing a test process at the company’s Texas facilities, is designed to send astronauts to Mars and establish a base. The astronauts’ initial goal would be to set up a propellant depot, which could harvest resources on Mars and create liquid oxygen and methane. This would be used to refuel the Starship and power its Raptor engines, which don’t need rocket propellant unlike those used on SpaceX’s current Falcon 9 rocket.