Elon Musk wants to fly you to Mars, the Moon, or NYC, all using the same rocket. Musk, whose SpaceX and Tesla companies have evolved from pie-in-the-sky ideas to private space flight and auto-piloting car realities, announced the plans in a speech in Adelaide, Australia. The rocket system would have more room onboard than an Airbus A380 commercial airliner and travel at a maximum speed of 17,000 mph.