This artist's rendering provided by SpaceX on Tuesday, Sept 27, 2016 shows the company's proposed Interplanetary Transport System passenger module on the surface a moon orbiting the planet Jupiter. For the past decade, Elon Musk has borrowed from science fiction and fantasy when naming his rockets, engines, capsules and other space doodads. For his first passenger ship, he is leaning toward the name "Heart of Gold," the starship in the novel "The Hitchhiker's Guide to the Galaxy." (SpaceX via AP)
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