Starship is the centerpiece of Musk's vision of sending the first humans to Mars, and is also critical in NASA's plans to return astronauts to the moon's surface for the first time in five decades.

How big is SpaceX's Starship rocket? Big. Very, very big. So big, in fact, that the spacecraft has earned the designation as the world's largest rocket. To put it in relatable terms, at about 400 feet ...