The age of the Big Bang’s occurrence happened,

The Big Bang Theory are a considered cosmological model that identify the form of the universe, and the known earliest periods. The Big Bang model explains the way which the universe expanded from high temperature state and very high-densities. Thus, describes large scale structures, Hubble’s law, light elements and CMB (cosmic microwave background) which was discovered in 1964 as in favor to the Big Bang Theory model. It is yet unclarified whether or not, the Big Bang happened as a singularity, moreover, if the active knowledge is an explanation to satistisfactory at given time. Furthermore, the estimated and calculated age of the Big Bang’s occurrence happened, and also considered as the age of the universe, about 13.8 billions years ago.The galaxies and stars, that are visible in modern time, occured via the initial expansion thus formed the galaxies and stars via giant clouds (simple atoms) a formation of the primordial elements that cooled down, moreover the gravity within the halos of the dark matter. The solar system’s formation standard model are referred to as the solar nebula hypothesis. The model concepts are thus, the formation of rotating of a large cloud of interstellar gas and dust formed via the solar system named the solar nebula. A creation made shortly post the big bang (13.8 billion years ago), the composition were made of helium and hydrogen, further heavy element faced a rejected of the supernovae. A shock wave may have triggered the nebula approximately 4.5 billion years ago from a closeby supernova, thus constructed a contraction that would lead to a rotation of the nebula. Moreover, as a result of the shock wave acceleration of the cloud occurred with an angular momentum and gravity, thus the inertia flattened perpendicular rotation of its axis of the protoplanetary disk. Due to several collisions little perturbations, and furthermore, angular momentum additional big debris matter generated the means via protoplanets up to kilometer-sized, a formation was initiated in an orbit around the center of the nebular. The lack of angular momentum resulted in a rapidly disintegration of the nebular center, soon heating under compression a process of nuclear fusion of hydrogen converted into helium embarked. In addition, furthermore contraction ignited the T Tauri star that developed into the sun. In according to this event, the gravity of the outer part of the nebula condensed matter throughout dust particles and density perturbations, thus the remains of the protoplanetary disk undertook a separation into rings. Bigger debris of dust and fragments clumped together by the runaway process accretion and formation of planets began. Planet Earth were formed about 4.54 billion years ago (with 1% uncertainty) in this way of manner, and were at completion within a periods of 10-20 million years after. T Tauri star cleared out majority via its solar wind most of the material within the disk that had not yet been condensed into greater bodies. The production of accretion disks in orbit of newly formed stars within the universe, were expected to go through similar process to  have yielded planets. As the proto-Earth grew accumulation to the point its interior reach a hot enough temperature to melt the heavy, siderophile metals. Due to higher densities than silicates resulting in the metals to sink. As a result of an iron catastrophe a primitive mantle and an metallic core started a separation, merely 10 million years since the Earth started its formation, this were the production of the layer structure and also the formation of the magnetic field of the Earth. The first to suggest that the inner core were a solid center, growing and freezing out from the liquid outer core caused by gradual cooling (Pr billion year/100 Celcius) of the interior of the Earth, were J.A.Jacobs. In Earth’s history the first eon – the Hadean – began at the formation of the planet Earth followed by the eon Archean at 3.8 billion years ago. Oldest dated rocks found (North American craton of Canada) on planet Earth approximately 4 billion years old, moreover, the oldest crystals (detrital zircon) found in rocks to about 4.4 billion years old, not long after the crust formation and Earth itself began. There is evidence showing that these crystals have been in contact with water (e.g. been rounded by erosion during transport via water), which suggests that planet Earth had seas or oceans at given time. Furthermore, shown traces of metamorphism via high temperature of the rocks. According to the giant impact hypothesis, explains not long after the initial crust were developed, a lesser protoplanet impacted the proto-Earth, which led to an part of the crust and mantle got ejected into space and the Moon’s formation began. The Earth had cooled notably, although life forms were not able to survive due to the lack of oxygen in the atmosphere during the Archean, moreover, no ozone layer were present to block out ultraviolet light. However, candidate fossils dated around 3.5 billion years ago, could state that primordial life began to evolve during the early stages of the Archean, even so it is speculated that life began in the early times of Hadean 4.4 billion years ago. In the early stages of the Archean (approximately 3 billion years ago) 1,600 celsius were the temperature of the mantle, which is much hotter that today, states a faster convection in the mantle. Tectonic plates were believed to be lesser in size due to a faster process of plate tectonics, and subduction zones were more common during the time of the Hadean and the Archean. From the solar nebula the first atmosphere captured (atmophile) an element composition of light, contained mostly helium and hydrogen. The second atmosphere, where poor in oxygen, but rich in greenhouse gases, caused by the impact thus the creation of the moon, led the molten Earth to release volatile gases, that later were released by volcanoes. The third atmosphere emerged approximately 2.8 billion years ago, bacteria started production of oxygen which led to richness in oxygen. In according the the cooling of the Earth, cloud formation occurred and rain formed the oceans. Origin of life of simpler organic compounds, accordingly; amino acids, and nucleobases.During the Archean and the Proterozoic eons the natural evolution of the sun became much more luminous (increases ever billion years with 6%). In according to this, Earth in the Proterozoic eon received more heat from the sun, although planet Earth cooled drastically in the early stages of Proterozoic. Evidence found in South Africa of glacial deposits 2.2 billion years ago states, a location near the equator could have been possible, furthermore, the Earth is speculated to have been frozen from pol to pol, over the equator, this is a hypothesis referred to as ‘Snowball Earth’. Although, the uncertainty of origin of time which domain splitted firstly. But a probability, are, that bacteria splittet off from another lifeform such as Neomura. Shortly after, about 2 billion years ago Neomura splittet into Eukarya and Archaea. Pannotia – a supercontinent – broke apart into lesser parts of continents such as Baltica, Siberia, Gondwana and Laurentia, in the end of the Proterozoic. More volcanic activity caused more oceanic crust to be formed, in a time where continents moved apart. Approximately from 380-375 million years ago in the Ordovician period, tetrapods started to evolved from fish, in these stages they would only have fins evolved into limbs, so the possibility of living in oxygen-poor water or shallow water where they can capture prey, whilst lifting their head above water to breathe in air when needed. Eventually adaptations to the terrestrial environment occurred and thus amphibians emerged. By the late period of Triassic only small mammals, with the possibility to be nocturnal animals as well to survive the dinosaurs.The first classified genus Homo appeared 2 million years ago, with an increased brain size.