system
Given the following post, respond as if you're commenting on Reddit:
human
[StarWars] does the Earth have enough resources to make a death Star? If not how many Earth sized planets might it take?

Everything I find talks about price or how long it would take to make but not how many resources it would take.
gpt
Yes, assuming it doesn't include any really exotic materials.

The Death Star is somewhere around 120 - 140 km in diameter, which is only about 1% of the Earth's size.  The Earth's crust is 5% iron, so you could probably strip mine the hell out of the planet and have enough resources.