Monday, June 14, 2021


George Lemaitre was the first in 1927,to theorize that the recession of nearby galaxies can be explained by an expanding universe which was observationally confirmed  two years later by Edwin Hubble. Georges Lamaitre proposed the Big Bang Theory of the origin of the Universe, calling it hypothesis of the beginning of the world.

According to BB, when the our Universe was born, all the matter and energy was compressed onto a single point of infinite density and extreme heat. Suddenly this unstable point expanded violently and exponentially. It is a misconception that BB was an explosion. Imagine the explosion of a bomb with matter that flies outward from a center.

 1.    BB is not an explosion of matter in space, explosion is not part of theory. BB is a rapid expansion of space, every part of space participated in it. If it was an explosion it would have a center. Scientists think space is expanding everywhere, in all directions equally. Space, according to Einstein has structure, it is flexible, can be stretched. Expanding of Universe is the stretching of space between clusters of galaxies, not the motion of galaxies through space. Later, scientists found other properties of space, there is evidence that space itself posses some of its own energy.

2,   The BB theory assumes that space, time, and energy  already existed. But it tells us nothing about where they came from

The BB theory says the Universe we know it started with a small singularity that inflated over the 13.8 billion years ago ; the singularity existed before BB.

The BB might not be the very beginning of the cosmos itself, but is the beginning of Our universe as we recognize it, it is Our beginning. It may not be the entire story, but it's a part of cosmic story. The current instruments don't allow astronomers to peer back at the Universe birth. But astronomers can see the "echo" of the expansion through a phenomenon known as Cosmic Microwave Background (CMB). 

The Universe being hotter in the past would have been hot enough to prevent neutral atoms from forming, meaning that should be a leftover glow of radiation emitted when those neutral atoms finally formed.

In 1964 two radio astronomers Arno Penzias and Robert Wilson discovered the faint of radiation, CMB, the prediction of radiation of BB, they are Nobel Prize winners for this discovery in 1978. Most astronomers are convinced that BB is the best theory in cosmology about the origin of universe even it is incomplete.

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