This Is Elon Musk’s Plan to Send Humans to Mars by Katie Fehrenbacher @FortuneMagazine 2:26 PM EDT E-mail Tweet Facebook Linkedin Share icons Billionaire entrepreneur Elon Musk just unveiled his plan to send human beings to Mars using technology from his space company SpaceX. In advance of an astronautical conference in Guadalajara, Mexico on Tuesday, SpaceX unveiled a video that depicts a huge spaceship and rocket, which will launch and separate in orbit, enabling the booster portion to return to Earth. The booster then relaunches and refuels the spaceship that’s waiting for it in orbit, providing it with enough fuel to head to Mars. The video then shows the spaceship opening up wings of solar panels that help provide enough energy to make the coasting trip to the Red Planet, carrying its human cargo in tow. Musk called the video that can be viewed on YouTube, “Making Humans a Multiplanetary Species.” On Twitter, Musk said the rocket booster would have a 12-meter diameter, while the spaceship would have a 17-meter spaceship diameter. The entire stack would reach 122 meters tall. Musk has been talking about sending humans to Mars for many years. SpaceX has planned to send its Dragon cargo capsule to the planet as early as 2018, using its Falcon Heavy rocket. A human SpaceX mission could supposedly leave Earth in 2024 and arrive on Mars the next year. Get Data Sheet, Fortune’s technology newsletter. Like with everything that Musk does, that timeline is particularly aggressive. NASA has said it plans to send humans to Mars in the 2030s. The cost of such a mission could be tens of billions of dollars. SpaceX hit a major setback earlier this month when there was an explosion at its Falcon 9 rocket launch site in Cape Canaveral, Fla., which could be heard from 30 miles away. The site was preparing to launch of an unmanned communications satellite that would provide connectivity for Facebook fb in Africa. For more on SpaceX’s Falcon 9, watch: While no one was injured, the satellite was destroyed. Last week, Musk said that the launch site had suffered a large breach in its upper-stage helium tank. Another SpaceX Falcon 9 rocket exploded during flight last summer. However, SpaceX has previously had 18 successful Falcon 9 launches. Fortune will update the story throughout Musk’s talk at the conference.