3 ms·

I thought Orbitals were Dyson spheres. What are they?

• wiml 6y ago
  Banks' "Orbitals" are smaller rings, perhaps planet-diameter, orbiting at a distance from their star; "Rings" are Niven-Ringworld-style structures with a star in the middle. Spheres are mentioned here and there, I think, just called "spheres".
• mkl 6y ago
  They are Rings but smaller. Culture Rings are like Niven's Ringworld, and go all the way around a star, spinning around the star to simulate gravity. Culture orbitals are also ring-shaped and spinning to simulate gravity, but they're nowhere near as big (relatively speaking; still more surface area than Earth), and generally orbit a star more like a planet does. Culture Spheres are Dyson spheres.
  • simonh 6y ago
    I don't think the Culture builds rings or spheres themselves, but they exist and they are aware of them. There are civilizations in the galaxy considerably more advanced than the Culture.
    • dodobirdlord 6y ago
      I believe the Culture is credited as having creating the ring in Consider Phlebas.
      • mkl 6y ago
        Do you mean Vavatch, that was scheduled for destruction? That was Culture, but an Orbital.
        • arethuza 6y ago
          Vavatch was destroyed by a militarised Culture GSV but it wasn't "owned" by the Culture.
          • p_l 6y ago
            Vavatch was, IIRC (I'd have to search through) built by Culture, but since then ceded, similarly the ships that helped evacuate it
  • arethuza 6y ago
    The size of an Orbital is dictated by day length and surface "gravity" - they are arguably more elegant than Niven style Rings which need a lot of extra stuff to generate day/night cycles (shadow squares?).
    • mkl 6y ago
      Yes. One book (The Player of Games?) gave enough numbers for me to do the calculations, and it matched about 24h and 1g.