The echo of the Big Bang

The echo of the Big Bang

The big Bang Is a scientific model describing the early moments of the universe. About 13.8 billion years ago, the universe exploded. Evidence of a Big Bang can be found throughout the cosmos, the strongest known as cosmic microwave background radiation (CMBR). CMBR can be considered as an echo of the Big Bang; The radiation emitted during the Big Bang can be seen through a telescope. CMBR is a picture of a universe just 380,000 years old. This is a picture before the formation of the universe Stars And Galaxies, Represents the earliest moments we can physically see. What is CMBR and why is it so important?

The universe after the Big Bang

A diagram showing the Big Bang, NASA

In the first 380,000 years after the Big Bang, The universe It was very different from where we were staying. The temperature in the early universe was too hot for atoms to form, instead the particles moved freely in space. The temperature was so high that protons, neutrons, and electrons could not combine to form atoms. The universe was filled with dense and hot fog. As time passed and the universe expanded, things began to cool. When the temperature was low enough, protons and neutrons began to capture electrons. It had a remarkable impact on the universe. Before atoms formed, particles of light (photons) were constantly erupting from other particles. Light The early universe could not escape the fog, but as the atoms began to form, photons could travel through the universe. These photons became CMBR. Thus, CMBR is the earliest light in the universe to begin its journey across the universe independently. When we look at images of the CMBR, we see light that began its journey 13.8 billion years ago.

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Features of CMBR

Image of cosmic microwave background radiation taken by NASA / ESA, the Planck satellite

Images of CMBR can look like a vague collection of colors. Different colors are actually the most important characteristic of CMBR. Different colors represent areas with different temperatures and densities. Interestingly, these regions of different densities created a mystery to astronomers to some extent. For the most part, the early universe was completely homogeneous. All regions of the universe are virtually identical to all other regions. However, this unity was shattered at the very beginning of the history of the universe. As soon as the universe came into being, there was a moment of rapid expansion known as inflation. At this moment, the universe is expanding faster than it has ever expanded in its volume. This rapid expansion rate shattered the uniformity of the early universe and led to small differences observed in the CMBR. Over the course of millions of years, areas of higher density brought in more material and became denser. The first is in these densely populated areas Galaxies And galaxy clusters formed. If it were not for these small variations in density millions of years ago, Stars And Galaxies Would never have formed, and we would not be here today to study the early moments of the universe.

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