We began by looking at how big the Death Star is. The first one is reported to be 140km in diameter and it sure looks like it's made of steel. But how much steel? We decided to model the Death Star as having a similar density in steel as a modern warship. After all, they're both essentially floating weapons platforms so that seems reasonable.
But, before you go off to start building your apocalyptic weapon, do bear in mind two things. Firstly, the two billion death stars is mostly from the Earth's core which we would all really rather you didn't remove. And secondly, at today's rate of steel production (1.3 billion tonnes annually), it would take 833,315 years to produce enough steel to begin work. So once someone notices what you're up to, you have to fend them off for 800 millennia before you have a chance to fight back. In context, it takes under an hour to get the steel for HMS Illustrious.
Oh, and the cost of the steel alone? At 2012 prices, about $852,000,000,000,000,000. Or roughly 13,000 times the world's GDP.*
But then again, you can just take out a loan from the entire planet and then default on them in the most awesome way possible.
Anyone keen to chuck in?
Edited by psyche101, 21 February 2012 - 02:22 AM.