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 (6,980 words) - 16:28, 21 August 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 (16,104 words) - 03:21, 2 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) - 14:38, 4 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...
35 KB (4,268 words) - 00:42, 3 August 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 (16,435 words) - 06:47, 5 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 (6,730 words) - 18:56, 10 September 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 (3,973 words) - 16:35, 21 August 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 (5,647 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) - 04:05, 9 June 2024