Dark matter is a form of matter thought to account for approximately 85% of the matter in the universe and about a quarter of its total mass–energy density or about 2.241×10−27 kg/m3.
Dark matter is composed of particles that do not absorb, reflect, or emit light, so they cannot be detected by observing electromagnetic radiation. We assume that dark matter may account for the unexplained motions of stars within galaxies.
Dark matter is the most mysterious, non-interacting substance in the Universe. Its gravitational effects are necessary to explain the rotation of galaxies, the motions of clusters, and the largest scale-structure in the entire Universe.
Without Dark Matter, there would likely be no life in the Universe.
But the question that troubles us all is: What is Dark Matter?
Well, in short, we have no idea!
Dark Matter is perhaps nothing but just ordinary matter in another dimension hovering right above us.
Maybe, everything beyond our 3 dimensional perception of the Universe appears to be invisible to us. A part of the Universe which accounts for a substantial part of it, inconceivable to our narrow vision.
We obviously cannot ignore the existence of Dark Matter, given that we have to point towards something to be able to define the components of the Universe.
Dark Matter certainly exists. But what is it? And why? Those question will remain for some time.
Theoretically, it is much more likely that Dark Matter is ordinary matter, just like the one we see everyday, floating across our Universe in higher dimensions, beyond our reaches of perception.
P.S. Dark matter is not, to anyone’s knowledge, linked with dark energy, another mysterious phenomenon responsible for accelerating the expansion of the cosmos. The two simply share the word “dark,” which is often used as a placeholder by us for things we don’t entirely understand.