Explanation, please, of Matter, Dark Matter & Dark Energy?

Question

I'm interested in the interactions between the three. How do they (it) affect the other. I understand that we are unable to I.D. Dark Energy and Dark Matter, due to instrumentation anomolies/understanding. I'm more interested in the Dark Energy and Dark Matter parts of this question. References would be appreciated. I do understand the complexity of the question but I'm looking for a point of origin for future discussion purposes. Serious answers only please.

Answer 1

Dark matter is some mysterious kind of matter, called 'dark' because it does not appear to emit electromagnetic radiation (light, radio waves, x-rays, etc). It is detected through its gravity; scientists have inferred that it exists through observing galaxies that are spinning too fast for the gravity of their normal matter to hold them together, so dark matter is required. No one knows what exactly dark matter is, so far our best guess is that we are observing the cumulative gravitational effects of enormous numbers of neutrinos. And we may be close to cracking the problem; just recently, scientists found a faraway galaxy which is composed almost entirely of dark matter. At any rate, dark matter interacts with other things in the Universe primarily through gravity (so far we don't know of any other way in which it interacts with things).

Dark Energy is a mysterious form of energy that pervades the Universe. According to our best observations, it is distributed very evenly across space (it doesn't clump together the way dark matter and normal matter do). The strange thing about it is that it repels things; its force is opposite to that of gravity. It was first observed in the early 1990s when some scientists looked at distant supernovas and discovered that they were more redshifted than they should have been, proving that the Universe was not only expanding (that had been known for some time), but expanding faster and faster. No one knows what causes dark energy, right now it's even more mysterious than dark matter.

Now here's the scary part: Normal matter and energy make up only 4% of the Universe. 23% of the Universe is dark matter. And 73% is dark energy. That means 96% of everything there is is composed of stuff we know almost nothing about. Rather humbling, isn't it?

Answer 2

darkish count number is an invention predicated on the idea that a galaxy is a satellite tv for pc equipment,and is ruled by technique of gravity. A galaxy became initially assembled by technique of gravity yet yet another pressure took over as stars migrated in direction of the galactic midsection. A galaxy is an entity in a state of sped up cave in. darkish means is,supposedly,inflicting the universe to strengthen at an accelerating cost. The universe is a finite entity so that's enlargement is constrained,it has a optimal and a minimum length,because it techniques that's optimal length it starts off to bypass out of existence. All count number is linked with a gravitational field. that's mass determines that's gravity density. The extra huge the body the further it perturbs the area round it,this truth is obtrusive at the same time as gentle passes close to to the body and impacts it as a curved area. If a galaxy became spoke of with a spectrograph the gentle will be shifted in direction of the pink it became accelerating faraway from you yet in case you ought to word it from the different section it would now look accelerating contained in the different direction A black hollow does no longer live on the galactic midsection,neutron density count number is what drives it. there are a decision of rationalization why a black hollow is a non workable entity.

Answer 3

For most part I agree with green_meklar. Some additional information. If darkmatter is mainly made of neutrinos, it is called "hot dark matter" and it also assumes mass for neutrinos. Theory predicts mass less than 10 eV for neutrinos. The problem is that most of the cosmological evolution theories like cold dark matter (Basically made of stuff like brown dwarf stars, white dwarf stars WIMPS and stuff like that). Usually people study dark matter by studying the gravitational effect of the dark matter (gravitational lensing, rotation curves of spiral galaxies, galaxy cluster potential etc.)

Dark energy is slightly easier to understand theoretically.

Answer 4

i would give you the answer but i fear your brain would explode into several (tasty) chunks