What is Big Bang theory?

What is Big Bang theory?

It has fascinated humanity so much that cosmologists have devoted their entire lives gazing into the space to find the answer to the most important question about the universe and how it evolved it’s actions in the past, present and future, and how it came into existence in the first place?

A lot of scientists assume that the universe began nearly 13.7 billion years ago with a massive explosion of an extremely hot bubble that was thousands of times smaller than a pinhead this idea at first was jokingly referred to as “The Big Bang” but as the time progressed and evidence piled up the concept and the name stuck with the scientific community.

After the explosion the universe we know today was born. And with it time, space and matter came into existence. And it all happened in a fraction of a second. In just a matter of seconds the Universe grew from smaller to bigger than a single atom to bigger than a galaxy and it kept on expanding at a phenomenal rate and continues to grow even today. As the Universe cooled down the energy converted into particles of matter and antimatter.

These 2 opposite types of particles fought hard and largely destroyed each other. But some brave matter managed to survive. Please note that just one second has gone by so far since the beginning of everything and the universe has already grown into one hundred billion kilometers and is cold enough to form more stable particles called protons and neutrons. Over the next three minutes, the temperature fell below 1 billion degrees Celsius.

Now the universe got colder to allow the protons and neutrons to come together and form its first atom, the hydrogen. After millions of years when the hydrogen gas clumped together and gravity started to put it under pressure stars and galaxies began to form. Their radiations began dissolving the stable hydrogen gas into plasma that allowed visible light to pass. And finally, there was light.

Did you know, the single super-concentrated point or bubble which later became the Universe before the Big Bang was called “Primeval atom” or the “Cosmic egg”? Also in one of the possible scenarios for the ultimate fate of the Universe known as Big Crunch the Universe will eventually stop expanding and start collapsing in on itself. Then, however another Big Bang might happen.