What is cosmology?

Without a doubt, we live in a world and universe that is full of outstandingly wonderful beauty and complexity. For centuries upon centuries, humans have remained dumbfounded with the majesty of the universe in which we have found ourselves. But not everyone stopped at just simply admiring the universe, some other people took their curiosity to the next level by deciding to study and examine, and this is what brought us the field of knowledge called cosmology.

  Cosmology is a section of astronomy that focuses on the study of the origin and evolution of our universe. It is a field of science that seeks to understand the birth of the universe from the time of the Big Bang and on how it has transformed over time until this stage. So, more precisely, cosmology can be defined as the scientific study of the entire universe on the grandest scale possible. The scientists who focused on cosmology are understandably referred to as cosmologists and it is their task to understand complex concepts like black holes, dark matter, string theory, dark energy and others.

There is also an interesting divergence of opinion among the cosmological community. There are two main camps, there is one in which the cosmologists believe that there is just one universe and there is another camp of cosmologists who believe that there are different universes. This latter concept is called the multiverse theory of the universe.

 As hinted earlier, the pursuit of knowledge as far as understanding the universe is concerned has been with us for centuries upon centuries. When astronomy started, scholars did not understand the world the way we now understand it. In fact, scholars at that time believed that our planet was the sole centre of the entire universe. They believed that the sun, stars, and other planets all moved around the earth. It was not until later that a brilliant scientist from Poland named Copernicus dropped the idea that our world and other planets are actually revolving round the sun. This Copernican theory of planetary motion radically changed the way we saw the world. But as expected, not everyone was interested in changing and some even attacked Copernicus and insisted that the right concept was the geocentric (earth-centred) theory.

 The Church was the most powerful institution in the world at that time and they went against any idea of the earth not being the centre of the universe. This remained the status quo for centuries but with time, some newer scientists made discoveries that showed clearly that Copernicus was not only right, but that he was a genius far ahead of his time. Today, thanks to the relentless works of the scientists, we now have a far better understanding and comprehension of the heavens above us.

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