An Etymological Dictionary of Astronomy and Astrophysics

A model of the → Universe which is devoid of matter and where the → space-time is → open
(Ω_M = 0, Ω_R = 0, Ω_Λ = 0, k = -1). The Universe will expand at a constant rate for ever. See also → empty Universe, → de Sitter Universe.

See also: Put forward by Edward Arthur Milne (1896-1950), a British astrophysicist, who introduced the → cosmological principle; → cosmological; → model.