SpaceX's Starship SN5 Flew the Skies for 40 Seconds: Musk Said 'Mars is Looking Real' SpaceX's Starship SN5 prototype flew its 1st test flight. If everything goes well, SpaceX's future spaceflights could help human beings get a million-person city running on Mars in the next 50 to 100 years. by Giuliano J. de Leon