The expansion of the universe is the increase in distance between gravitationally unbound parts of the observable universe with time. It is an intrinsic...
53 KB (6,979 words) - 21:33, 25 September 2024
Observations show that the expansion of the universe is accelerating, such that the velocity at which a distant galaxy recedes from the observer is continuously...
39 KB (4,825 words) - 17:14, 23 August 2024
Big Bang (redirect from Theories on the origin of the universe)
uniformity of the universe, known as the flatness problem, is explained through cosmic inflation: a sudden and very rapid expansion of space during the earliest...
150 KB (16,101 words) - 05:11, 19 September 2024
the acceleration of the expansion of the universe, and about 25.8%±1.1% is dark matter. Ordinary ('baryonic') matter is therefore only 4.84%±0.1% of the...
158 KB (16,558 words) - 01:01, 26 September 2024
and the accelerated expansion of the universe due to cosmic inflation. Tiny ripples in the universe at this stage are believed to be the basis of large-scale...
138 KB (13,964 words) - 05:57, 26 September 2024
depends on knowing the rate of expansion, average density of matter, and the physical properties of the mass–energy in the universe. There is a strong...
36 KB (4,313 words) - 16:12, 27 September 2024
beginning of the cosmological expansion. Initially, it was estimated that there may be 2 trillion galaxies in the observable universe. That number was reduced...
65 KB (6,729 words) - 17:19, 6 October 2024
radiation give the cooling time of the universe since the Big Bang, and measurements of the expansion rate of the universe can be used to calculate its approximate...
34 KB (3,946 words) - 06:03, 8 October 2024
observations suggest that the expansion of the universe will continue forever. The prevailing theory is that the universe will cool as it expands, eventually...
52 KB (5,660 words) - 14:27, 4 September 2024
Scale factor (cosmology) (redirect from Scale factor (universe))
The expansion of the universe is parametrized by a dimensionless scale factor a {\displaystyle a} . Also known as the cosmic scale factor or sometimes...
13 KB (1,938 words) - 02:20, 9 October 2024
Void (astronomy) (redirect from Hole in the universe)
the galaxies due to the expansion of the universe according to Hubble's law. A summarized timeline of important events in the field of cosmic voids from...
37 KB (4,466 words) - 13:03, 13 October 2024
Cosmic inflation (redirect from Inflationary expansion)
inflation, is a theory of exponential expansion of space in the very early universe. Following the inflationary period, the universe continued to expand...
106 KB (12,721 words) - 18:15, 2 October 2024
Hubble's law (redirect from Hubble expansion)
the first observational basis for the expansion of the universe, and today it serves as one of the pieces of evidence most often cited in support of the...
131 KB (13,011 words) - 17:27, 11 October 2024
Dark energy (category Pages using sidebar with the child parameter)
proposed form of energy that affects the universe on the largest scales. Its primary effect is to drive the accelerating expansion of the universe. Assuming...
86 KB (9,657 words) - 17:38, 17 September 2024
This is the timeline of the Universe from Big Bang to Heat Death scenario. The different eras of the universe are shown. The heat death will occur in around...
14 KB (472 words) - 16:23, 7 October 2024
cosmology, the shape of the universe refers to both its local and global geometry. Local geometry is defined primarily by its curvature, while the global...
30 KB (3,840 words) - 21:17, 12 September 2024
The heat death of the universe (also known as the Big Chill or Big Freeze) is a hypothesis on the ultimate fate of the universe, which suggests the universe...
30 KB (3,433 words) - 15:21, 11 September 2024
Cyclic model (redirect from Oscillatory universe)
of several cosmological models in which the universe follows infinite, or indefinite, self-sustaining cycles. For example, the oscillating universe theory...
14 KB (1,613 words) - 01:50, 21 September 2024
The timeline of the early universe outlines the formation and subsequent evolution of the Universe from the Big Bang (13.799 ± 0.021 billion years ago)...
36 KB (5,008 words) - 07:50, 6 October 2024
and the accelerated expansion of the universe can be characterized by the equation of state of dark energy. In the simplest case, the equation of state...
8 KB (1,059 words) - 01:59, 13 August 2024
measure the expansion of the universe Mark M. Phillips (1951–) used supernova observations to discover acceleration in the expansion of the universe, calibrated...
20 KB (2,499 words) - 17:34, 16 September 2024
Cosmological constant (category Pages using sidebar with the child parameter)
constant to zero. That changed with the discovery in 1998 that the expansion of the universe is accelerating, implying that the cosmological constant may have...
49 KB (5,649 words) - 12:25, 7 October 2024
cosmological constant is zero. If so (absent some other form of dark energy), the expansion of the universe would be decelerating. However, after Saul Perlmutter...
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explored the nature of matter and the cosmos in his 1225 treatise De Luce (On Light). He described the birth of the universe in an explosion and the crystallization...
20 KB (2,604 words) - 20:58, 22 September 2024
Big Crunch (redirect from The Big Crunch)
The Big Crunch is a hypothetical scenario for the ultimate fate of the universe, in which the expansion of the universe eventually reverses and the universe...
23 KB (2,885 words) - 16:12, 7 October 2024
contributions to the expansion of the universe as time elapses. Specifically, when the universe is radiation dominated, the expansion factor scales as...
6 KB (762 words) - 15:50, 16 June 2024
Expansion of the universe, the increase of the distance between two distant parts of the universe with time Expansion (economics), an increase in the...
2 KB (296 words) - 14:06, 7 February 2024
1;: 5 the number density of photons in the CMB is one billion times (109) the number density of matter in the universe. Without the expansion of the universe...
108 KB (13,172 words) - 18:52, 18 September 2024
Comoving and proper distances (category Pages using sidebar with the child parameter)
Comoving distance factors out the expansion of the universe, giving a distance that does not change in time due to the expansion of space (though this may change...
18 KB (2,447 words) - 19:26, 7 June 2024
Big Rip (redirect from The big rip)
apart by the expansion of the universe at a certain time in the future, until distances between particles will infinitely increase. According to the standard...
11 KB (1,302 words) - 16:54, 10 October 2024