BIG BANG THEORY
The Big Bang Theory is one of the most important ideas in science about how the universe began. It says the universe began as a singularity which was a tiny and dense point about 13.8 billion years ago. This point exploded in an event known as the Big Bang, causing everything to spread out and expand. Time and space were created by this expansion.
In the beginning, the universe was just a hot mix of tiny particles. As the universe expanded, it cooled down, and these particles started to form atoms, the basic building blocks of matter. These atoms eventually joined to create galaxies and stars. This was the beginning of the universe as we know it today.
The Cosmic Microwave Background (CMB) radiation is one of the most important pieces of evidence for the Big Bang Theory. Scientists can still detect this heat, which is the remains of the Big Bang. The idea is further supported by the evidence that galaxies are moving away from us. The universe is still expanding as proved by this movement just as it did after the Big Bang.
The universe is still growing, and scientists believe it will keep expanding for a long time. However, there are different ideas about how this might end. One theory is the Big Freeze where the universe gets so spread out that stars run out of fuel and die. Another idea is the Big Crunch where the universe could eventually stop expanding and start collapsing back in on itself.
In summary, the Big Bang Theory explains the universe's origin and its expansion over billions of years. It is an important part of modern science, helping us understand both the universe's future and our place in it.
Article By
Pradeepitha A. Wijenayaka
Faculty of Engineering