That Dyson Sphere makes no sense. Everything on the inside surface would just fall inwards into the star.
Actually, the whole basis of a Dyson Sphere is that it's big enough to compensate for this.
If I remember correctly, because of it's size, and the thickness of the hull, things on the interior surface are held to it. The best I can think of (And I can swear I remember my teacher explaining it like this):
Think of it as Earth, only bigger, and inside out. The star still generates it's gravitational pull, as you can't change the laws of the universe, but the near-outer layer of the hull is much like the core of Earth, generating it's own pull. The size of the sphere is purpose-built so that the balance of forces are equal. You will not "fall" up to the star.
Failing that explanation. Artificial Gravity systems would always do the trick, and if you can build something that large, surely you'd have discovered such a technical feat. Humans surely passed it, as you can walk around your starship, rather than float, so... It would've been something the race discovered long ago I assume.
Sorry, just something I had to put my nose in.
