The creation of the universe and how it was formed remains a mystery for many of us. There were actually lots of stories and myths on how the universe came into being including the nine planets and the Earth that we inhabit. The currently accepted explanation on how the universe was created is the Big Bang Theory. This theory suggests that the universe was once an extremely dense and hot matter. And on one event, a massive cosmic explosion called the Big Bang happened about billions of years ago. Since then, the universe was believed to be expanding and cooling.
How Universe was Formed
Big Bang Theory
Cosmologists or the scientists who study the evolution of the universe were looking into two theories regarding the beginning of the universe. These theories were the big bang theory and the steady state theory. The big bang theory proposes that the universe came into being after an enormous explosion. The steady state theory suggests that the universe had always existed from the beginning of time. Although there were conflicting propositions, most scientists have accepted the Big bang theory as the way to explain how the universe was formed.
The Big Bang theory was based on the mathematical equations. These equations are as known as field of equations patterned form the general equations of the theory of relativity by Albert Einstein. The set of solutions which was provided by the Russian scientist Alexander Friedmann became the existing theoretical framework of the big bang theory.
Even the American astronomer Edwin Hubble substantiated the theory when he discovered about the “tired light” theories. The astronomer further found that the universe is expanding consistently and galaxies are moving away in a proportional speed. The only thing that remains to be unknown is the universe’s initial state before the explosion.
Formation Of Universe
Once compact and dense, the explosion has actually unified everything. As eruption happened in space, the formation of matter, energy and even time started. The early universe expanded and cooled which allowed protons, neutrons and electrons to begin forming.
The cooling of the universe has also allowed small atomic nuclei to form while interaction occurred between protons and neutrons. The explosion has also created basic forces including gravity. These forces have caused early atoms to combine together and formed dense clouds called nebulae.
Over time, nebulae break down and stars were created in the universe. Stars have their own gravitational force which squeezes the atoms inside it and becomes heavier. As stars use up all its nuclear fuel, it will then explode and end its life which is called the supernova. The cycle of the formation of the stars will then start anew. The stars that are drawn together in the universe can form into large clusters which are called galaxies. And one of those galaxies is the Milky Way. For some billions of years ago, a star is formed in the Milky Way called the sun.
In the early years, the sun’s force has attracted gas and dust from the neighboring space. Some of this material started to rotate around the sun and forming a circling disc. Dust and gasses begin to bundle together and formed into larger objects later known as the planets which circled around the sun. The nine planets that were formed comprised the solar system with the sun at the center. Each planet has varying distance from the sun with its own orbit and circles around it.
Scientists today continue to collect data within the theoretical framework of the Big Bang theory. Observations are constantly made in order to validate the theory as to the beginning and formation of the universe. Scientists also adjust the theory in order to match it with their noted observations. The Big Bang theory remains to offer the most probable explanation on how the universe was formed. But the reality of the universe’s creation will remain a mystery as well as our existence in this planet. For more detailed information on formation of universe, please check out the links below.