Elon Musk reveals huge main body tool of SpaceX's big rocket, and parks a Tesla next to it for scale. Elon Musk has posted a photo of the enormous main body tool of SpaceX's big rocket, the spacecraft that will be used to take humans to Mars by 2022. The image, which he posted on Instagram, shows a huge cylindrical metal object, and Musk has even parked a Tesla car next to it for size comparison. The rocket will be fully reusable and capable of refueling in space, which is key for SpaceX's plans to send humans to Mars. The image, which he posted on Instagram, shows a huge cylindrical metal object, and Musk has even parked a Tesla car next to it for size comparison. The rocket will be fully reusable and capable of refueling in space, which is key for SpaceX's plans to send humans to Mars. BFR will stand at 106 meters tall and 9 meters in diameter, with space for 150 tons of cargo. Musk has suggested that the BFR could be used to take humans to the moon, Mars, and even on high-speed journeys around Earth. But Musk has highlighted that the BFR comes with several design challenges. He said, the ship part is by far the hardest, because that's going to come in from superorbital velocity around planets including Mars, which is way harder than coming in from orbit. With efforts now focused on the BFR, we could see a full scale test in the next three to four years, according to Musk. He added, most of our engineering resources will be dedicated to BFR. I think this will make this go quickly.