Dark Matter is extra gravity...without dark matter all galaxies would fly out into the universe. It is said that dark matter is everywhere. It is undetectible with the naked eye... And yes it is confusing....Dark energy is even a bit more confusing. Please read my theory on my discussion page, and it may clear up some things for you.
Thanks, Jay

Thank you so much and i got rather curious about the topic on which you had written

Dark matter is a unit quantum of negative energy which cannot be devided since a medium of transferrable and absorbable much lesser energetic dark energy,the .000005 energy present in every vaccuum of an atom and space.