Cosmic  Inflation

According to the Big Bang theory, the universe began as a singular point. Everything was packed extremely close together, and after the explosion, all the matter began racing outwards, speeding out in all directions. In the first moments after the Big Bang, the universe was about 5.5 billion Celsius (10 billion Fahrenheit) and ballooned faster than the speed of light. During this time, the universe doubled in size at least 90 times. In less than the blink of an eye, a speck smaller than the size of a proton expanded to the size of a grapefruit. This phenomenon has been named cosmic inflation.
The rapid stretching of the universe smoothed out any irregularities, making it uniform in all directions. After the period of rapid cosmic inflation ended, the universe continued expanding at a slower pace, cooling down enough for matter and radiation to form the beginnings of galaxies. Much like many things in our profoundly perplexing cosmos, the exact cause of inflation is still debated among scientists, but it likely resulted from a special kind of energy field called the ‘inflaton field’,