Big Bang
Theory
13.7
billion years ago.
The entire
universe was inside a bubble.
Thousands
of times smaller than a pinhead.
Was names
SINGULARITY.
And
then?
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| source |
It
exploded….!!!!!
In a
fraction of second, it grew from singularity to bigger than a galaxy.
And it
kept on growing.
And you
know what? It is still expanding today.
Universe
expanded and cooled.
Energy
changed into particles of matter and anti-matter.
Two
opposite types of particles destroyed each other.
Some of
them survived.
Stable
ones called protons and neutrons started to form when the universe was
one
second old.
Over the
next three minutes, temperature dropped below 1 billion degrees.
Cool enough
for protons and neutrons to come together
and form
hydrogen + helium nuclei.
After
300,000 years, the universe had cooled to about
3000
degrees.
Atomic nuclei
could finally capture electrons to form atoms.
The
universe was filled with clouds of hydrogen and helium gas.
These clouds
of dust and gasses formed all celestial bodies afterwards.
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