Mystery of the dark matter

Dark Matter research is unresolved. It account for 25% of total energy density. Dark Matter is subject related to particle physics, astrophysics, cosmology. There is other matter other then ordinary matter that binds the galaxies that too 5-6 times the visible matter called as dark matter. Einstein field theory of general relativity also help up to find about Dark Matter by its cosmological constant. Dark Matter presently consider as negative mass fluid which works against the expansion of universe and binds the galaxies together. We can measure the mass of visible matter then we can find out the invisible matter mass. We live in the universe which is 95% dark. Here we will discuss about Dark matter that compromise of 6 times the mass of ordinary matter.