What is dark energy and/or dark matter?

Answer 1

Dark energy comprises 70% of the universe and dark matter comprises 26% of the universe. Ordinary baryonic matter, in the form of gas and stars, only makes up 4%.

Dark matter refers to matter particles, of unknown composition, that do not emit or reflect enough electromagnetic radiation to be detected directly, but whose presence may be inferred from gravitational effects on visible matter such as stars and galaxies. Dark matter is explained as being cold, non-baryonic, collision-less dust.

Dark energy is a hypothetical form of energy which permeates all of space and has strong negative pressure. According to the theory of relativity, the effect of such a negative pressure is qualitatively similar to a force acting in opposition to gravity at large scales. In other words, dark energy acts as a repulsive force or anti-gravitation and is responsible for the acceleration of the universe.

Answer 2

As far as I know from reading an article on dark matter I found out that dark energy is actually still unfdefined by scientists- though the dark matter is considered to be whatever stuff that makes up a black hole- but scientists still don't fully understand what the stuff really is.

Answer 3

In cosmology, dark energy is a hypothetical form of energy which permeates all of space and has strong negative pressure. According to the theory of relativity, the effect of such a negative pressure is qualitatively similar to a force acting in opposition to gravity at large scales. Invoking such an effect is currently the most popular method for explaining the observations of an accelerating universe as well as accounting for a significant portion of the missing mass in the universe.

Answer 4

Dark matter accounts for approximately 90 per cent of all matter in the universe, and no one has a clue as to what it is or how to find it. only because of mathematical laws of physics is its existance provable. You see, because of the way ordinary matter behaves, there has to be dark matter. Additionally, no one can figure out why there is not more anti-matter then actually exist. Logically, this can not be, but, it is so. So much for logic in the physical universe. As for dark energy, show me, don't tell me!

Answer 5

Weird stuff that we can speculate about for years and never know the truth. It may not even exist! Dark matter is the stuff we can't see that we want to be there, it may not exist. Dark energy is energy we can't see that we assume has to be there, that may not exist. All this stuff is theoretical, so it may not exist outside a textbook. This sparks questions like, do "black holes" really exist. or are they something else? (That is a question for Quantum Mechanics.)

Answer 6

question of the millenium!
It is a vast nothing in the universe which presumably makes up 90 % and above of the universe. Stare into the nght sky, u see nothing but blackness at many places. THe 3D universe, contains some thing (previously called ether) now confirmed to be nothing. This nothingness is the dark matter

Answer 7

Dark Matter/Dark Energy is the way for mathematicians to provide for an undetectable remainder in their calculations of how the glaxy and universe work; there is a bit of a hole in their equation for our current theories of newtonian physics to be correct in understanding how our universe works Dark Matter/ Energy must exist and is conveniently undetectable

Answer 8

No one has the definitive answer to your question. Dark energy is the name given to the unknown force that is causing the expansion rate of the universe to increase. Dark matter is some unknown physical feature of the universe that causes spiral galaxies to rotate as they do.