It's no secret that SpaceX has been constructing its Starship test vehicle -- it's easy for curious onlookers to snap photos. But what will it look like when it's finished? You don't have to wonder. Elon Musk has posted concept artwork showing what the completed vehicle will look like. It's surprisingly pretty for a prototype, if borrowing more than a few cues from 1950s sci-fi with its gleaming stainless steel body.