The sheer logistics of a 160-km wide metal rock being mined, then all that material being moved to another location just to build a 160-km wide artificial moon somewhere else made me ask this question.

Were there any engineering reasons why the Death Star wasn't built in situ, from whatever object they got the materials from?

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  • Okay, changing some words Feb 10, 2017 at 0:08
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    You might also want to note that, mindful of the failings of prior Death Stars, the First Order built their superweapon out of a planetoid.
    – Valorum
    Feb 10, 2017 at 0:09
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    I've done a very big edit to try to make your question a bit clearer. Close vote retracted.
    – Valorum
    Feb 10, 2017 at 0:15
  • @Valorum that shows my ignorance but doesn't tell why deathstar and its bigger version 2 built in space :) Feb 10, 2017 at 0:15
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    @Tim its like asking why someone fill sands in ocean shore to build an artificial island (like world-islands) instead of building things on real islands LOL Feb 10, 2017 at 0:52

1 Answer 1


Possibly because real asteroids have different compositions. No doubt many different materials would be used in the Death Star, some very common in asteroids and others very rare in asteroids.

Depending on the composition of an asteroid and the composition of the Death Star an asteroid might be made of 2 percent Death Star building materials or 20 percent Death Star building materials or 84.6 percent Death Star building materials or 0.04 percent Death Star building materials or some other percentage.

The other matter in the asteroid that can't be use to build the Death Star has to be thrown away.

So instead of building the Death Star out of a single asteroid it makes more sense to mine many asteroids of different types for the different needed materials and transport those materials to space or planetary refineries and factories to convert them into Death Star parts and then take them to where the Death Star is being built floating in space.

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