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DARK MATTER

 






Our universe is full of many many mysterious things and unknown objects and bodies which we can't know. The same is true of galaxies in clusters, which leads scientists to believe that something we cannot see is at work. They think something is missing by us, from where our galaxies extra mass is came.





DARK MATTER:-  

                                  One question is always irritate us that "Form which thing that our universe is made form?" And it is a nice questions about our universe. 

                   Many of you are thinking that " what are you talking, it is obvious that the universe is made form the matter". Yes this is right answer I can't refuse it but which matter, yes I am which matter ? 

                   There are two types of matter in our universe 

1. Normal matter 

2. Dark matter 

Normal matter is that which is made us and many many thighs in the universe is made by normal matter but not all the things is made by normal matter. 



           A big part of our universe is made by dark matter so what is the dark matter actually.

       Unlike normal matter, dark matter does not interact with the electromagnetic force. This means it does not absorb, reflect or emit light, making it extremely hard to spot. In fact, researchers have been able to infer the existence of dark matter only from the gravitational effect it seems to have on visible matter. Dark matter seems to outweigh visible matter roughly six to one, making up about 27% of the universe. Here's a sobering fact: The matter we know and that makes up all stars and galaxies only accounts for 5% of the content of the universe! But what is dark matter? One idea is that it could contain "supersymmetric particles" – hypothesized particles that are partners to those already known in the Standard Model. Experiments at the Large Hadron Collider (LHC) may provide more direct clues about dark matter. 

DARK ENERGY 

Dark energy makes up approximately 68% of the universe and appears to be associated with the vacuum in space. It is distributed evenly throughout the universe, not only in space but also in time – in other words, its effect is not diluted as the universe expands. The even distribution means that dark energy does not have any local gravitational effects, but rather a global effect on the universe as a whole. This leads to a repulsive force, which tends to accelerate the expansion of the universe. The rate of expansion and its acceleration can be measured by observations based on the Hubble law. These measurements, together with other scientific data, have confirmed the existence of dark energy and provide an estimate of just how much of this mysterious substance exists.

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