The mission to make humans "a multiplanetary species" just got a little bit closer to becoming a reality. Elon Musk's SpaceX program published a video Tuesday describing how the proposed Interplanetary Transport System would actually work — and it involves 28,730,000 pounds of thrust for lift off, the support of a refueling pod, and winged solar panels to provide additional power to the ITS: Musk is delivering a presentation on colonizing and building a city on Mars at the International Astronautical Conference in Guadalajara, Mexico (you can follow continual updates at The Verge, here).