whats the difference between the concepts of dark matter and dark energy?

Answer 1

They are entirely unrelated.

Dark matter is an as yet unknown substance. We call it dark because it does not interact with the electromagnetic force, or light, and therefore is invisible. Dark matter does have mass, and does exert its gravitational force on regular matter. Years ago, physicists were looking for an explanation as to why spiral galaxies, which should fly apart as its arms swirl around the center, remain intact. Something with great mass surrounding the galaxies seems to hold the spiral arms in place, otherwise they would fling billions of stars into space. So dark matter emerged as the best theory. Contraversy remains as to whether this is actually a new kind of matter, or the effects of gravity at large scales.

Dark energy is believed to be the force of the expansion of the universe. This is vacuum energy, the force that tends to push objects away from each other. This force was confirmed in the famous Casimir expirement in 1948. Dark energy acts as an anti-gravity force, pushing the large galactic clusters further apart as it expands the size of the voids between them.

Answer 2

Dark Matter Is Space Matter We Cant See , It Does Not Give Off Light. Its Gravity Pulls On Stars And Gallaxies Changing Their Orbit And Rotation

Dark Energy Is Negtive Energy That Gives Off Negative Charges

Answer 3

Dark matter, to me, is a word scientists are using to describe the invisible force around us all. Einstein delved first into this with his Theory of Universal Gravitation. The theory is easy to visualize. Pretend you have a towel and suspend its four corners like it was a tent. This towel represents space time, but since many scientists think that is too vague they want an actual subsatnce, or dark matter. Now place a heavy ball in the middle. The towel bends around it. Now place a smaller and lighter ball at an edge. The smaller ball moves towards the bigger ball beacuse the bigger ball is distorting the towel/space-time/dark matter. This is gravity in a nutshell and an example of what I think dark matter is.

Answer 4

The water is muddy here. Dark energy is sought to explain what scientists think is missing in the total mass of the universe, dark energy is an invention of theorists to explain the expansion of the universe.

Answer 5

dark be counted is unseen be counted regarded as the reason for planets no longer flying aside". It has seeing that been shown via quite a few self sustaining techniques and study. dark power is the "anti-gravity" tension that expands the universe and the Cosmological consistent is an equation which defines the cost of the expansion of the universe. dark power is the tension at the back of what's accelerating that expansion.

Answer 6

Dark matter supplies gravity, dark energy goes counter to gravity. ~

Answer 7

Hi. Read up! http://www.answers.com/dark+matter?cat=technology&gwp=13
http://www.answers.com/dark+energy?cat=technology&gwp=13