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(cosmology) the cosmic explosion that is hypothesized to have marked the origin of the universe big bang
(cosmology) the theory that the universe originated 20 billion years ago from the cataclysmic explosion of a small mass of matter at extremely high density and temperature big-bang theory , big bang theory
(cosmology) the cooled remnant of the hot big bang that fills the entire universe and can be observed today with an average temperature of about 2.725 kelvin CBR , CMB , CMBR , cosmic background radiation , cosmic microwave background , cosmic microwave background radiation
(cosmology) a universe in which there is sufficient matter to halt the expansion that began with the big bang and to cause the universe to collapse again; the visible matter is only 10 percent of the matter required for closure but there may be large amou closed universe
(cosmology) a hypothetical one-dimensional subatomic particle having a concentration of energy and the dynamic properties of a flexible loop cosmic string , string
(cosmology) a hypothetical form of matter that is believed to make up 90 percent of the matter in the universe; it is invisible (does not absorb or emit light) and does not collide with atomic particles but exerts gravitational force dark matter
one of four substances thought in ancient and medieval cosmology to constitute the physical universe element
English astrophysicist and advocate of the steady state theory of cosmology; described processes of nucleosynthesis inside stars (1915-2001) Fred Hoyle , Hoyle , Sir Fred Hoyle
(cosmology) the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer; the reciprocal of the Hubble constant is the age of the universe Hubble's constant , Hubble constant
(cosmology) a brief exponential expansion of the universe (faster than the speed of light) postulated to have occurred shortly after the big bang inflation
(cosmology) a theory that involves an eleven-dimensional universe in which the weak and strong forces and gravity are unified and to which all the string theories belong M-theory
(cosmology) the theory that the solar system evolved from a hot gaseous nebula nebular hypothesis
(cosmology) the theory that the solar system was formed by the gravitational accumulation of planetesimals planetesimal hypothesis
(cosmology) a theory that postulates that subatomic particles are one-dimensional strings string theory
bright positive masculine principle in Chinese dualistic cosmology yang
dark negative feminine principle in Chinese dualistic cosmology yin
(cosmology) the original matter that (according to the big bang theory) existed before the formation of the chemical elements ylem
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