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.

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