| slovo | definícia |
big bang
(gcide) | big bang \big bang\ n. (Astron.)
The explosive event marking the beginning of the known
universe, according to big bang theory; the beginning of
time.
Note: The big bang is likened to a massive explosion from a
point containing all of the matter and energy of the
beginning universe, which started the expansion and
evolution of the universe which continues today. The
evidence for such an event includes the apparently
expanding size of the present universe, and a
background microwave radiation of about 3[deg] Kelvin,
equal to that predicted from mathematical models of
such an explosive event.
[PJC] |
big bang
(wn) | big bang
n 1: (cosmology) the cosmic explosion that is hypothesized to
have marked the origin of the universe |
| | podobné slovo | definícia |
big bang theory
(encz) | big bang theory,teorie velkého třesku |
big bang theory
(gcide) | big bang theory \big bang theory\ n. (Astronomy, Cosmology)
The theory that the known universe originated in an explosive
event (the big bang) in which all of the matter and energy
of the universe was contained in a single point and began to
rapidly expand and evolve, starting as high-energy particles
and radiation, and, as it cooled over time, evolving into
ordinary subatomic particles, atoms, and then stars and
galaxies. According to this theory, the four-dimensional
space-time continuum which we perceive as our universe
continues to expand to the present time, but it is unknown
whether the expansion will continue indefinitely or
eventually stop or even reverse, possibly leading to a
contraction to a single point sometimes referred to as the
"big crunch". The competing "Steady-state Theory" gradually
lost favor in the 1980's and 1990's. See also big bang.
[PJC] |
big bang theory
(wn) | big bang theory
n 1: (cosmology) the theory that the universe originated
sometime between 10 billion and 20 billion years ago from
the cataclysmic explosion of a small volume of matter at
extremely high density and temperature [syn: {big-bang
theory}, big bang theory] |
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