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Anatomy of the Universe

THE UNIVERSE CONTAINS EVERYTHING that exists from the tiniest subatomic particles to galactic suoerclusters (the largest known structure.

Click the link to watch on YouTube video.. 

https://youtu.be/mm0Bo7bVy60

Nobody knows how big the Universe is. But estronomers estimate that it contains at least 125 billion galaxies, each galaxy comprise of an average of 100 billion stars. 🌟

The most widely accepted theory about the origin of the Universe is BIG BANG EXPOSION.

-THE BIG BANG-UP that took place between 10 and 20 billion years ago.
The universe initially consisted of a very hot 🔥 ,dense 🔥 fire ball of expanding ,cooling gas. After about one million years, the gas began to condense into lacalized clumps called PROTOGALAXIES.

During the next five years the protogalaxies continued condensing,forming galaxies in which stars were Born. Today, billions years later the Universe as a whole is still expanding. Although there are localized areas in which objects are held together by gravity. For example many galaxies are found in clusters.

The Big Bang Theory is supported by the discovery of faint,  cool background radiation coming evenly from all directions. This radiation is believe to be the remnant of the radiation produced by the Big Bang,  small ripples in the temperature of the cosmic background radiation are thought to be evidence of slight fluctuations in the density of the early universe. Which resulted in the formation of galaxies.

Astronomers do not yet know if the Universe is closed, which means it will eventually stop expanding and began to contract, OR if it is open, which means it will continue expanding forever.

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