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The common thing about "dark matter" and "dark energy" is that we can't see them -Because they don't interact via the electromagnetic force, ie light, (plus the related radio waves and gamma rays).But there are many subatomic particles and force fields which don't interact via the electromagnetic force, so that doesn't narrow it dQuoteown too much.
own too much.
The contrasting thing about "dark matter" and "dark energy" is thatDark matter is thought to be some (as yet unclear) particle(s), which adds to the mass of galaxies, holding them together, and slowing the expansion of the universe.Dark energy is thought to be some (as yet unclear) force field which actually accelerates the expansion of the universeJust because they are both unclear at this time does not mean that they are equal.In fact, these opposing properties suggest that they are something quite different
A favoured theory at present is that dark energy is made up of some Weakly Interacting Massive Particles (or WIMPs), possibly some predicted by the supersymmetry theory of particle physics.
It is possible that the LHC may be able to produce some of these super-partners in the next few years (if they really do exist), and that might give us some more clues about what they are, and how they behave.