isotropy of space-time
31Principle of relativity — In physics, the principle of relativity is the requirement that the equations describing the laws of physics have the same form in all admissible frames of reference. For example, in the framework of special relativity the Maxwell equations have… …
32No-hair theorem — The no hair theorem postulates that all black hole solutions of the Einstein Maxwell equations of gravitation and electromagnetism in general relativity can be completely characterized by only three externally observable classical parameters:… …
33No hair theorem — The no hair theorem in astrophysics postulates that all black hole solutions of the Einstein Maxwell equations of gravitation and electromagnetism in general relativity can be completely characterized by only three externally observable classical …
34Cosmological principle — See also: Friedmann Lemaître Robertson Walker metric and Large scale structure of the cosmos Physical cosmology …
35astronomy — /euh stron euh mee/, n. the science that deals with the material universe beyond the earth s atmosphere. [1175 1225; ME astronomie ( < AF) < L astronomia < Gk. See ASTRO , NOMY] * * * I Science dealing with the origin, evolution, composition,… …
36rock — rock1 rockless, adj. rocklike, adj. /rok/, n. 1. a large mass of stone forming a hill, cliff, promontory, or the like. 2. Geol. a. mineral matter of variable composition, consolidated or unconsolidated, assembled in masses or considerable… …
37Rock — /rok/, n. a male given name. * * * I In geology, a naturally occurring and coherent aggregate of minerals. The three major classes of rock igneous, sedimentary, and metamorphic are based on the processes that formed them. These three classes are… …
38Structure formation — refers to a fundamental problem in physical cosmology. The universe, as is now known from observations of the cosmic microwave background radiation, began in a hot, dense, nearly uniform state approximately 13.7 Gyr ago. [cite journal |author=D.… …
39Comoving distance — Physical cosmology Universe · Big Bang …
40de Sitter universe — Physical cosmology Universe · Big Bang …
