KNOW O BRAIN

This vast universe has many unsolved and unknown dark secrets. We try to find answers to the questions that become more of an exasperation cause for us and thus we again come to a stoppage where next question awaits with or without the previous answers. Till date, we believed in what really could be seen, however, reality opposed this fact of existence and non-existence. And such facts are coming out of blue which alter our perceptions.

WHAT WE KNOW
Upto the minute facts reveal that about 70-71% of the whole universe is made of dark energy or is dark energy (still to be figured out), nearly 25-26% of dark matter. Only 4% of the universe was known to us before these theories were unveiled.
Till 1990, we knew about expansion of universe and two main hypotheses prevalent were that the energy density of the universe is either too high to initially expand it to the farthest and ultimately contract into a big 'O'(zero) or too low due to which it will remain expanding and that too at an accelerating rate. In 1998, hubble space telescope captured images of a supernova which suggested that expansion rate of universe is far more today than in the past.

ENCOUNTERING DARK ENERGY
Thus the fact was revealed that something is that seems nothing causing universe's expansion but no one was able to explain, what it is. For the record, hypothesis of 'DARK ENERGY' was put forward that is present nowhere i.e. there, where there is nothing. We can neither test it nor calculate it but we can only feel its influence.

SUGGESTIONS ON IT'S BEHAVIOUR
The place where this form of energy is present start creating or developing into some or the other thing. Einstein was the first one to observe and say "Where there is nothing, there is something", and in his theory of gravity he gave a cosmological constant but was unable to explain about why it was required due to which his theory was rejected. Although, some scientists tried to understand cosmological constant and l the amount of power, dark energy can provide to an empty space but unfortunately attempts failed. Finally it was concluded that Einstein's theory of gravity was wrong and that we need a new theory that could explain behaviour of smallest of the smallest and biggest of the biggest particle of the universe.

After every dawn sunrises and hope never relies

A hypothetical form of matter is believed to exist in the external space that accounts for more than three-fourth of the total matter and approximately quarter of the energy present in universe and yet it remains elusive. In 1933,swiss astrophysicist Fritz Zwicky obtained evidence of unseen mass and he named it dunkle materiel(THE DARK MATTER).

Majority of the dark matter present is considered non-baryonic i.e. comprised of particles like electrons and neutrinos (leptons). It is named so because of the fact that it neither absorbs nor emits any kind of energy or light. Only a small part of universe consists visible matter is also a well known fact though. An intriguing alternative view is that dark matter is made of black hole formed during the first second of the universe. And now one of the scientists at NASA says that this some how is interrelated with the context of cosmic infrared and X-rays context.

However, these are all theories and we have no serious evidences to prove any of these put forward hypothesis. The nature of dark matter is also one of the prominent question unsolved. Scientist so far believe the models that explain the dark matter as an exotic massive particle but they have all failed to turn up evidence.

A considered myth or fact whatever be said is that black hole comprises dark matter and that this dark matter and black hole were once visible matter and by passing time their energy density increased so much that they got engulfed in themselves.

There is a lot more this universe holds up and the need is to sophisticate ourselves in order to know the darkest secrets of the universe and in the particular context, yet unknown.