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Trantor is a fictional planet in Isaac Asimov's Foundation Series and Empire Series of science fiction novels.

Trantor was first described in a short story by Asimov appearing in Early Asimov Volume 1. Later Trantor gained prominence when the 1940s Foundation Series first appeared in print (in the form of short stories). Asimov described Trantor as being in the center of the galaxy. In later stories he acknowledged the growth in astronomical knowledge by retconning its position to be as close to the galactic center as was compatible with human habitability. The first time it was acknowledged in novel form was in Pebble in the Sky.[1]


Geography and history

The earlier history of Trantor is recapitulated in The Currents of Space, mentioning the five worlds of the Trantorian Republic growing into the Trantorian Confederation and then Trantorian Empire (evidently modeled on the Roman Republic, originally ruling only part of central Italy, developing into the vast Roman Empire).

At the time when Currents takes place, Trantor controls about half of the worlds in the Galaxy, while the other half is divided into innumerable independent worlds and miniature empires – which naturally makes a Trantorian Ambassador a person of great consequence on any of the still-independent worlds.

Later on, conquest of the entire galaxy made the Galactic Empire, with Trantor as its capital planet, a reality; the planet no longer sending out ambassadors, but only governors to royal subject worlds. This situation had already existed for thousands of years at the time of Pebble in the Sky, the next chronological book on this timeline.

Trantor is depicted as the capital of the first Galactic Empire. Its land surface of 194,000,000 km² (75,000,000 miles², 130% of Earth land area)[2] was, with the exception of the Imperial Palace[3], entirely enclosed in artificial domes.[4][5]

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