Have you ever wondered what led to the beginning of our beautiful universe? Well, we cannot say for certain, but with all the scientific evidence we have it is most likely The Big Bang.
The Big Bang Theory is a physical Theory that suggests how the universe might have been formed. The theory suggests that before the universe was formed there was a dense and super hot point. This point which had no atoms and no structure is said to be a singularity. Now this singularity went through extreme hot which resulted in its rapid expansion and subsequent cooling. This expansion continues until today and will most probably continue for a long time.
This whole event was named The Big Bang.
The first person to propose that the universe might be expanding was Georges Lemaître in 1927.
His proposal was confirmed by Edwin Hubble two years later.
We also have evidence to back the Big Bang theory. It is a phenomenon called cosmological Redshift which occurs due to the Doppler effect of light.
When an object moves far from us (I am talking light years), it takes light a lot of time to reach us. Due to this, the wavelength of light stretches and the light reaches the end of the spectrum and appears red.
As I told you before, the universe is continuously expanding, the space between expanding, leading to our galaxies moving away from each other. This leads to cosmological redshift, and Redshift is used to determine the distance between two heavenly bodies.
Some people have suggested some alternatives to thw Big Bang theory. The most popular ones include The Steady State Theory, Eternal Inflation, etc. However, these have been rejected by most cosmologists.
If you have any questions, or if I made any mistakes, or you want to me write about a topic, feel free to comment!
