Alternative form of music of the spheres

(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.

(mathematics) A sphere with a radius of 1 unit.

(topology, complex analysis) The complex numbers extended with the number ∞; the complex plane (representation of the complex numbers as a Euclidean plane) extended with a single idealised point at infinity and consequently homeomorphic to a sphere in 3-dimensional Euclidean space.

plural of sphere of influence

plural of exotic sphere

A manifold (of any dimension) homeomorphic to a sphere but not diffeomorphic to the standard sphere.

Alternative spelling of celestial sphere

plural of sphere of knowledge

(physics) A volume whose radius is the Debye length, in which there is a sphere of influence, and outside of which charges are electrically screened.