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After reading the first Foundation book in the series, I asked myself if Trantor was Earth at one point. I don't think Asimov ever mentions Earth in the Foundation series.

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    Never mentions it? One of the Foundation book actually has Earth in the title :) Commented Jul 9, 2013 at 16:26
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    Now that I've thought about it, Earth is referenced (though not by name) in the first book. Lord Dorwin discusses the origin of humanity with Hardin, and lists Sol (the Sun) as a possibility. Commented Jul 9, 2013 at 16:49
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    Yeah, the location of earth becomes a side-plot and eventually a main plot in the foundation series. I think it's meant to be an analogy for the search for the original homeland of the human race on earth (hint: Africa). Commented Jul 9, 2013 at 19:55
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    Commented Jul 31, 2013 at 15:33

6 Answers 6

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Definitely not, given Trantor's physical location in the galaxy and its planetary properties. Trantor is located as close to the galactic core as possible for humans to still be able to inhabit it. It is also slightly larger than Earth.

Trantor was first mentioned in a short story by Asimov, 'Black Friar of the Flame', later collected as The Early Asimov, Volume 1. It was described as a human-settled planet in the part of the galaxy not ruled by an intelligent reptilian race (later defeated). Later, Trantor gained prominence when the 1940s Foundation series first appeared in print (in the form of short stories). Ref: Wikipedia -> Trantor

  • Asimov described Trantor as being in the centre of the galaxy. Earth is located on the Orion Arm out near the edge of the galaxy.

  • In later stories he acknowledged the growth in astronomical knowledge by retconning its position to be as close to the galactic centre as was compatible with human habitability. The first time it was acknowledged in novel form was in Pebble in the Sky.

  • 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) was, with the exception of the Imperial Palace, entirely enclosed in artificial domes.

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    @Thaddues: All that logic is slightly unnecessary since the assumption that earth isn't mentioned in the foundation books is wrong. It is mentioned and is clearly not Trantor as Keen has said. :)
    – Chris
    Commented Jul 9, 2013 at 16:18
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    Since I answered the question first, I simply wanted to assure the OP there were several reasons this could not be the case. Surely there is nothing wrong with clarity? I also wanted him to have the option to continue reading without spoiling and without adding a spoiler... Commented Jul 9, 2013 at 16:29
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    The fact that Asimov reused the name "Trantor" doesn't necessarily mean that "Foundation" is set in the same fictional universe as "Black Friar of the Flame". If so, what happened to those reptilian Vegans, the Lhasinu? Do they turn up again?
    – user14111
    Commented Apr 12, 2015 at 22:48
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How many Foundation books have you read? By Foundation's Edge, it's clear that Earth isn't a known planet in the Foundation time-frame. The following book, Foundation and Earth is all about the search for Earth, and it is definitely not Trantor.

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  • I've really only read Foundation. That's it. Vernor Vinge sort of caught my attention after I finished Foundation. Commented Jul 10, 2013 at 0:36
  • Not really needed to go that far. Early on the first Foundation book an emissary is sent from the empire (on Hardin times, during the Crisis of Anacreon) which states he is studying “The Owiwin Question the place of owiwin of the human race” Commented Feb 28, 2022 at 20:25
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Trantor was never intended to be Earth. Thaddeus's answer gives some evidence from early canon.

Later Asimov linked the Foundation universe with the Robots universe, which situated Earth in the Foundation universe. Robots and Empire is the original book that connects the two; it explains what happened to the planet Earth and lays the groundwork for why the Empire, the Foundations and Gaia came to exist. The 1980s Foundations books expand on that connection.

In Robots and Empire, the Earth is rendered uninhabitable. The two humaniform robots Giskard and Daneel decide not to prevent this, so as to give humanity an impulse to spread out and thrive throughout the galaxy. Daneel starts imagining how he will guide mankind in secret.

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Pebble in the Sky was published in 1950, between the original Foundation stories appearing in magazine form and in book form.

It identifies Earth as a small but particularly annoying part of the Trantorian Empire.

In Foundation, Lord Dorwin makes it clear that knowledge of the location of Earth is lost.

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    I don't think "knowledge of the location of Earth is lost" counts. If the knowledge is forgotten, Earth could be Trantor, only everyone has forgotten that. That wouldn't be the only big secret "forgotten" in the Foundation universe: just think of the existance of robots or of the Second Foundation. I agree with the part about Pebble in the Sky though.
    – b_jonas
    Commented Jul 10, 2013 at 10:25
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Lord Dorwin makes a brief mention of "Sol" in "Foundation" (chapter 2 - "The Encyclopedists). Speaking of possible locations for the first human world, he says (he drops his 'r's - sorry).

"Othahs insist on Alpha Centauwi, oah on Sol, oah on 61 Cygni – all in the Siwius sectah, you see"

So it's known that there's an ancient inhabited (or once inhabited) planet circling Sol - but no one knows for sure that that planet is the first planet with humans, and judging by the later books, no one associates the name "Earth" with that planet. Or possibly so many planets are called something like "Earth"/"New Earth"/"Earth 2" etc., that no one can use that information to determine which one is the real Earth (Troy, New York, is not where the Trojan horse was built).

Oops. Didn't see System Down's comment that mentions Dorwin.

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No.

The Empire Trilogy (Pebble in the Sky &cetera) mention that Earth is more or less abandoned, being just another podunk little planet in the Trantorian Empire.

Furthermore, if you're willing to endure some spoilers:

The twist ending of Foundation and Earth is that Earth was completely abandoned centuries before due to fallout from the war with the Spacers. Trantor is still inhabited, and IIRC was ruled out earlier in the book.

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