Elon Musk, who founded SpaceX in 2002, has a bold vision for sending Starship to Mars. Experts weigh in on what's realistic and what's overly optimistic.

Starship is expected to be used for the Artemis III crewed moon mission, and the eventually trek to Mars. Once fully operational, the plan is for the Super Heavy boosters to be launched and caught back at the Orbital Launch Integration Tower, where they will be repositioned and re-flown within an hour, Musk said.