After inflation stopped, the universe consisted of a quark—gluon plasma, as well as all other elementary particles. The CMB can be seen in all directions at a distance of roughly Gravity's effects are cumulative; by contrast, the effects of positive and negative charges tend to cancel one another, making electromagnetism relatively insignificant on astronomical length scales.
Observational evidence "[The] big bang picture is too firmly grounded in data from every area to be proved invalid in its general features. So our view cannot extend further backward in time, though the horizon recedes in space.
This question really has two parts. As the universe continued to cool down from its inconceivably hot state, various types of subatomic particles were able to form in short periods of time known as the quark epochthe hadron epochand the lepton epoch.
After 56, years, the universe had cooled to 8, degrees Celsius and the density of the matter distribution in the universe matched the density of radiation.
The photons released " decoupled " when these atoms formed can still be seen today; they form the cosmic microwave background CMB.
Thus, a homogeneous and isotropic universe is not a black hole. Homogeneous means that any place in the universe is equivalent to any other place.
However, the Lambda-Cold Dark Matter model Lambda-CDMin which the dark matter particles moved slowly compared to the speed of light, is the considered to be the standard model of Big Bang cosmology, as it best fits the available data. And it all began with the noted observation that massive stellar objects, many light years distant, were slowly moving away from us.
Other theories were advocated during this time as well, such as the Milne Model and the Oscillary Universe model. But luckily for us some matter survived.
Suddenly, the Singularity began expanding, and the universe as we know it began. Within the first fraction of a second of the universe's existence, the four fundamental forces had separated. Just as many astrophysicists felt that the expanding universe theory was a ploy to inject religion into science, many Christians have come to feel that the Big Bang is an effort to undermine the biblical account of creation.
The Big Bang model accounts for observations such as the correlation of distance and redshift of galaxies, the ratio of the number of hydrogen to helium atoms, and the microwave radiation background.
Nowadays, when people mention the big bang theory, they think of Sheldon Cooper and his utter lack of self-awareness during embarrassing social interactions. These galaxies also in turn formed their own clusters, which we know now as solar systems.
This is known as recombination for historical reasons; in fact electrons and nuclei were combining for the first time. At that time, all matter was compacted into a single point with infinite density and intense heat called a singularity. This metric contains a scale factorwhich describes how the size of the universe changes with time.
Viable, quantitative explanations for such phenomena are still being sought. Christ Ftaclas is an associate professor of physics, also at Michigan Tech. At around 47, years, the energy density of matter became larger than that of photons and neutrinosand began to dominate the large scale behavior of the universe.
But eventually, after numerous billion years of expansion, the growing abundance of dark energy caused the expansion of the universe to slowly begin to accelerate.
The universe was in a hot, dense state and began to expand through a process called inflation. It went from very small and very dense, to very hot, Then, it cooled as it expanded.
This process is now referred to as the Big Bang, a term first coined by Sir Fred Hoyle during a British Broadcasting Corporation (BBC) radio broadcast in About 10, years after the Big Bang, the Universe cooled to the point that the gravitational attraction of matter was the dominant form of energy density in the Universe.
The broadly accepted theory for the origin and evolution of our universe is the Big Bang model, which states that the universe began as an incredibly hot, dense point roughly billion years ago. The Big Bang Theory says that the CMB would be mostly the same, no matter where you look.
Examining the CMB also gives astronomers clues as to the composition of the universe.
The big bang theory describes the creation of everything in the universe. According to this theory, all the matter in the universe came into existence at the same time during an event known as the big bang, which happened about billion years ago.
According to the big bang theory, all the matter in the universe erupted from a singularity. Why didn't all this matter--cheek by jowl as it was--immediately collapse into a black hole?A description of the big bang which created the universe