A sphere is a geometric shape that can roughly be described as a ball-shaped object. It occurs in various contexts:
- Borg sphere, a large spherical starship often used as a long range tactical vessel.
- Delphic Expanse sphere, creations of the Sphere Builders to distort space to create an environment that could support them.
- Dyson sphere, a spherical structure built about a star to harness its energy.
- Saltah'na energy sphere, a creation to store the essence of a personality.