(mythology) A continuous, glorious, harmonious set of sounds that are not audible to ordinary human beings, produced by the movement of the celestial bodies. / (figuratively) Sublime, mysterious music.

plural of oblique sphere

plural of Riemann sphere

plural of sphere packing

plural of sublunary sphere

plural of unit sphere

plural of Bloch sphere

(quantum mechanics) A geometrical representation of the pure state space of a two-level quantum-mechanical system, or qubit.

plural of Hill sphere

(astronomy) The region in which a given astronomical body dominates the attraction of satellites.