Elon Musk, the founder of SpaceX, plans to fly a Japanese billionaire around the moon in 2023 inside a new rocket ship.
But the launch system, called Big Falcon Rocket, is ultimately designed to colonize Mars.
In September 2016 and 2017, Musk revealed new details and updates about his Mars colonization plan at the annual International Astronautical Congress.
IAC organizers hope Musk will return this year, but they don't know if he is coming.
On Monday, Elon Musk revealed the identity of...