How Creation Began by Amr Sherif (Book Summary)

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At some point in the past, more than 13.7 billion years ago, the universe and everything it contained was limited to a very small point called the “singularity”, which has a size and radius of zero, while its density and temperature were very high, reaching infinity, and as a result of an event, this singularity exploded generating energy and the universe began to expand in various directions, and at that moment the four forces that govern the universe were generated, which are the strong nuclear force, the weak nuclear force, the electromagnetic force and the force of gravity. Because of this expansion, the temperature of the universe began to decrease until it reached 10 billion degrees, which is a temperature that exceeds the temperature of the Sun's core by thousands of times, Consequently, part of the energy of the explosion condensed and turned into elementary subatomic particles such as photons, quarks, electrons and neutrons, and the collision of these elementary particles with each other led to the formation of new subatomic particles.
A few seconds later after the explosion, the temperature of the universe decreased more and reached a billion degrees, then the strong nuclear force, which is considered a short range attraction force, started to bind the protons and the neutrons together, forming the nuclei of atoms, as in the beginning the nuclei of heavy hydrogen atoms that contain one proton and one neutron has been formed. And then, the universe continued to expand and the temperature continued to decrease, until it reached 3 thousand degrees, then the electromagnetic forces of attraction began to make the positively charged nuclei combine with negative electrons to form atoms, so the first atom that was formed was the hydrogen atom, which later formed more than 75% From the mass of the universe. When the age of the universe reached a billion years, the temperature decreased more and more and became almost equal to the current temperature of the universe, and more parts of the universe began to condense and form what is known as cosmic clouds or cosmic dust, which began to cluster by the force of gravity and therefore its density increased as it started to rotate around itself And with that, galaxies began to form. And after the completion of 9 billion years after the creation of the universe, our "Milky Way" galaxy was created.

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