For, thousands of years, we have looked into the sky and
believed that the illuminated stuff are the truth. Scientists now know that the
truth is not what shines in the light but what hides in the dark hold the
truth. There is a mysterious dark energy that binds the stars and the Galaxies.
Every text book in cosmology says that universe
is made up of atoms. All these text books are wrong. 96% of the universe is
made up of Dark Energy and Dark Matter. They don’t interact with anything. They
don’t emit or absorb light.
73% is unknown, called Dark energy
23% is called Dark matter, which is believed to
be existing at the Centre of every Galaxy, called Black Holes and such other
exotic things.
4% is the visible material
Dark Energy is very different from Dark Matter.
It is the energy of the vacuum, energy of nothing. Nothingness has energy
pushing the universe apart, creating a one-way universe.
Science believe that dark energy was created
along with the dark matter at the moment of creation. It was always existed in
the universe. The gravitational force of the dark matter was kept as a check by
slowing down the expansion of the universe in the first 9 billion years after
the big bang. It had changed 5 billion years ago when the universe grew big
enough so that the dark matter is dispersed throughout the universe. The dark
energy was started to affect against the pull of Dark matter. And then the
universe began to expand at an accelerated rate.
When Einstein decided to test
his relativity on universe, he could not balance his equation on both sides of
the equal sign. His equation shows that the universe either expand or contract.
So Einstein proposed a repulsive vacuum energy to hold universe in balance
against the attractive gravity. He
called it a ‘Cosmological constant’ energy that would hold the universe in
balance.
When Hubble announced the
expanding universe, suddenly Einstein’s cosmological constant seemed become
irrelevant and he call it his ‘greatest blunder’. Einstein’s ‘greatest blunder’
was to determine whether the universe should die in ‘fire’ or in ‘ice’. Now it
is sure that the universe is going to die in ‘ice’, a cold death. In fact
Einstein’s equation was showing that the dark matter and visible matter is not
enough to show the curvature of the space.
When the dark energy
completely dominate on dark matter, the universe will enter into an exponential
expansion. In every unit of time it will double its size, unless the dark
energy reverse its sign.
Large
Scale structure of the Universe
(Image Curtsy:
Wikipedia)
