The Universe..
- The age of Universe - 13.7 billion years old
- Its contents - 4.6% atomic matter; 24% dark matter; and 71.4% dark energy
- Its shape - it is "flat", meaning space adheres to Euclidean geometry, where straight lines can be extended to infinity and the angles of a triangle add up to 180 degrees, etc.
- The ignition of the first stars - now timed to have occurred some 400 million years after the Big Bang
Origin :
The most popular and most believed theory of our Universe's origin is BIG BANG.
What is Big-Bang :
In the extreme dense and hot singularity due to some fluctuations the well - known phenomena of "virtual particle" creation and annihilation. The spontaneous appearance of subatomic particles from a vacuum is called a QUANTUM FLUCTUATION.
These fluctuations triggered the BIG BANG.
What happened then :
When the universe began, it was just hot tiny particles mixed with light and energy.
After its initial appearance, it apparently inflated, expended and cool, going from very very small and very very hot to the size and temperature of our current Universe full stop it continues to explain and cool to this day and we are inside of it into table creatures living on a unique planet, circling a beautiful star clustered together in a beautiful Galaxy soaring for the Cosmos.
The tiny particles group together full stop they formed atoms. Then those atoms group together.Over lots of time, atom come together to form stars and galaxies.
The first starts created bigger atoms and Groups of atoms called molecules that lead to more stores being born at the same time, Galaxies were crashing and grouping together.
As new stars were being born and died, then things like asteroids comets, planets, and black holes formed.
This is the BIG BANG THEORY.
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