Big Bang

The Big Bang model is that the universe began and expanded in very dense and hot conditions. The theory suggests that the measurements showed that the universe is still expanding today. [1]

Big Bang is a scientific theory on how the universe starts and then we will create stars and galaxies we will see today.

The universe begins with a very hot, small, and dense super power (a mixture of four basic powers) without stars, atoms, shapes and structures (called "singularities"). Approximately 13.7 billion years ago, [1] space expanded rapidly (hence the name "big bang"). It begins to form atoms, which ultimately leads to the formation of stars and galaxies. GeorgesLemaître continues pointing out first (1927) and the expanding universe can be traced back to the original single point. The universe is still expanding today and it is getting colder

Generally, as time goes by, the universe grows and the temperature goes down. Cosmology is to study how the universe starts and evolves. Scientists studying cosmology believe that Big Bang theory is consistent with what they have observed so far. [1]

Fred Hoole called this theory "Big Bang" on his radio program. He did not think that the big bang was right. Scientists who did not agree with him thought that the name was interesting and decided to use it. [2]

Scientists are based on various observations of the Big Bang theory. The most important thing is the red shift of a very far galaxy. Red shift is the Doppler effect occurring in light. When an object leaves the earth, its movement widens the wavelength of the light emitted from the object, so that color's light resembles red rather than the actual color. Since red is the longest wavelength in the visible spectrum, scientists use the term "red hot" to represent this extended light wave. The greater the red shift, the faster the object moves. By measuring redshifts, scientists prove that the universe is expanding and they can calculate the velocity of objects from the earth. Through very accurate observations and measurements, scientists believe that the universe is a singular point about 13.3 billion years ago. As most things get cold as they expand, scientists think the universe is very small and hot at the beginning. [3]

Another observation that supports the Big Bang theory is the content of chemical elements in the universe. The number of very light elements such as hydrogen, helium, lithium seems to be consistent with Big Bang's theory. Scientists also discovered "cosmic microwave background radiation". This type of radiation is called radio waves, and they are scattered anywhere in the universe. This radiation is currently very weak and cold, but in the past it was very strong and hot. [1]

The time to the appearance of the big bang is pointless. If the Big Bang is the beginning of time, there is no universe in front of the Big Bang. Without time, there is no "front". Other ideas suggest that the Big Bang was not the beginning of 13.8 billion years ago. On the contrary, some people think that there is a completely different universe before the Big Bang, but that may be very different from what we know today. [3]

Big Bang as the Origin of the Universe: A common misconception about the Big Bang model is to believe that it is the origin of the universe. However, the Big Bang model does not comment on how the universe was formed. The concept of the current Big Bang model assumes the existence of energy, time and space and does not comment on the origins of their origins and the intensive and high temperature initial state of the universe. Hubble 's law violates special relativity. Hubble 's law predicts galaxies that are beyond the distance of Hubble are faster than the speed of light. However, special relativity does not hold for movement beyond space. Hubble 's law expresses the expansion speed of space, not space.

Big Bang theory provides a comprehensive explanation for a wide range of observations, including abundant light element, CMB, large scale structure, Hubble's law. The framework of the Big Bang model relies on Einstein's general relativity theory and simplified spatial homogeneity and isotropy assumption. The governing equations were developed by Alexander Friedmann and a similar solution was developed by Willem de Sitter. Since then, astrophysicists have incorporated observation and theory into the Big Bang model as a parameterization of the Lambda-CDM model as a framework of current theoretical cosmology research. It is agreed that the Lambda-CDM model is the "standard model" of the current Big Bang cosmology and is the simplest model that can explain various measurements and observations related to cosmology.