the difference between dark matter and dark energy?
2007-03-24 14:33:25 · 8 answers · asked by Stephanie_ is_ bomb. 3 in Science & Mathematics ➔ Astronomy & Space
Dark matter is speculated to account for the fact that there seems to be more mass in the universe than there should be. Thus, they think there must be some form of invisable mass. Though its composition is totally speculative.
Dark energy is thought to be a sort of reverse-engery, or reverse-gravity. Possibly accounting for the observed expansion of the universe. Nothing else is known about this alleged 'substance' except that if it exists it would probably be very thin (not dense) and only seems to affect things gravitationally.
2007-03-24 14:42:50 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Though I'm not "up" on many current concepts, my understanding is this....
Dark matter is a substance that is not visible in the ElectroMagnetic Spectrum but has gravitational effects on what we can "see" in the EMS. The composition of dark matter is much debated.
Dark energy (which may make up the majority of the known universe) is the resulting conversion of dark matter into energy. It may be linked to E=mc2. However, like dark matter, dark energy is only noticable when it affects those things we can see.
2007-03-24 21:43:36 · answer #2 · answered by druidforce 1 · 0⤊ 0⤋
In astrophysics and cosmology, dark matter is matter, not directly observed and of unknown composition, that does not emit or reflect enough electromagnetic radiation to be detected directly, but whose presence can be inferred from gravitational effects on visible matter. According to the Standard Model of Cosmology, dark matter accounts for the vast majority of mass in the observable universe.
dark energy is a hypothetical form of energy that permeates all of space and has strong negative pressure.[1] 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 recent observations that the universe appears to be expanding at an accelerating rate, as well as accounting for a significant portion of the missing mass in the universe.
so basically the difference between them are the same as the differences between regular matter and energy, they are just known as "dark" because we can't detect them and we know nothing about them
:)
2007-03-24 22:24:08 · answer #3 · answered by Anonymous · 0⤊ 0⤋
DARK MATTER - An unknown form of matter that causes some unexplained motions of galaxies
DARK ENERGY - An unknown force that is causing the expansion rate of the universe to increase.
2007-03-24 22:23:07 · answer #4 · answered by Chug-a-Lug 7 · 0⤊ 0⤋
Matters-Energy same, Dark a condition don't confuse.
2007-03-24 21:38:48 · answer #5 · answered by Gelgamish 1 · 0⤊ 0⤋
Dark matter helps to compensate for the orbit and structure of galaxies to help fit theory, and dark energy is the power accelerating the expansion of the universe.
http://groups.google.co.in/group/neat-astronomy?hl=en
2007-03-25 09:08:27 · answer #6 · answered by chase 3 · 0⤊ 0⤋
You can argue there is no difference considering energy and matter are interchangeable.
2007-03-24 21:38:03 · answer #7 · answered by Geddy_V 2 · 0⤊ 1⤋
i dont know
2007-03-24 21:40:47 · answer #8 · answered by slugbug 2 · 0⤊ 1⤋