Quote:
Originally Posted by ChainLegacy
As far as I know, dark energy and dark matter are part of our universe. Their role isn't well understood but hasn't it recently come to light (lulz) that the dark matter actually accounts for much of the universe's mass?
What I meant to say, worded somewhat clumsily; is there a part of the universe in which there is no light whatsoever (total darkness)? Hasn't light infiltrated every reach of the universe, and some lightless portion would therefore be outside of it?
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That's a completely different matter. "Dark Matter" (which does indeed make up most of the universe) is not "Darkness". The name is simply referring to the fact that we can not see it, it is not emitting light -> Dark matter. Dark matter is not existing in some lightless portion of the universe, it exists pretty much everywhere, we simply can't see it, because it's "dark". It emits nothing, and no other light reflects off it.
But as I said, Dark matter is not "Darkness". Darkness doesn't exist. It's just like a Hole can't be said to exist. They are both just a lack of something.
If you had a hole in the ground, and the wall collapsed, filling it up, but leaving another hole next to it, would you say the hole has moved? No, the earth moved, and a new hole was left where the earth was. But the hole has not moved. Likewise Darkness does not move.
@Solace:
Your physicist friend was clearly not much of a physicist, you don't even need to bring Relativity into it, it's an elementary problem.