Lifeboat Foundation

I never heard of this sort of making bubbles. And the details given are slim. Anyone here of this?

The first Death Star had a diameter of between 140 and 160 kilometers. The second Death Star’s diameter ranged from 160 to 900 kilometers.

There are two near term technologies which could be applied to making Death Star sized structures:

1. Space bubbles
2. Robotic spiderfab construction

Giant Space Bubbles