What is the name of the spaceship in The Hitchhiker's Guide to the Galaxy powered by improbability? Heart of Gold. The Heart of Gold is the starship equipped with the Infinite Improbability Drive, a fictional engine that allows it to cross vast distances by passing through improbable states of existence.
The ship is introduced as a revolutionary prototype stolen by Zaphod Beeblebrox, who uses it to escape with Trillian. Arthur Dent and Ford Prefect later become passengers, bringing the story’s ordinary human perspective aboard the vessel. Because the drive makes improbable events happen, the ship’s journeys can produce surreal transformations and coincidences rather than conventional space travel.
The Heart of Gold is not the same as the Vogon Constructor Fleet, which belongs to the Vogons, or Starship Titanic, which appears in another Douglas Adams-related work. The name also fits the series’ comic contrast between grand science-fiction technology and casual, absurd explanations. Its drive is a parody of technobabble while also serving as a device for moving the characters into wildly unexpected situations.