Now we know how Elon Musk plans to get 1 million people to Mars.

At a conference in Mexico today (Sept. 27), the SpaceX founder and CEO unveiled the company's Interplanetary Transport System (ITS), which will combine the most powerful rocket ever built with a spaceship designed to carry at least 100 people to the Red Planet per flight.

If all goes according to plan, the reusable ITS will help humanity establish a permanent, self-sustaining colony on the Red Planet within the next 50 to 100 years, Musk said at the International Astronautical Congress in Guadalajara. [SpaceX's Interplanetary Transport for Mars in Images]

"What I really want to do here is to make Mars seem possible—make it seem as though it's something that we could do in our lifetimes, and that you can go," he said.

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