(January 15, 2019 at 6:08 am)T0 Th3 M4X Wrote:(January 15, 2019 at 4:02 am)pocaracas Wrote: Come on, M4X, don't get distracted!
Keep up the good talk:
About dark matter... well... gravitational effects have been observed where no matter can be observed to produce them. So, if we can't see it, it's because it's dark.
Go outside, pick up some dirt, let the sun set in a moonless night and look at the dirt on your hand. That's dark matter. It produces no light for it to be observed.
In the case of cosmic dark matter, the thing is a bit more complicated, because it seems to emit no radiation at all, while your dirt will emit some IR from temperature, and some other spectroscopic emission lines from natural radioactive isotopes. Dark matter emits nothing of the sort, but is well masked within the background microwave emission.
Sounds convenient when you can know something is there without saying you actually observed it, but rather cite something that may or may not indicate it to try and prove it. To suggests it accounts for 85-95 percent of the matter in the universe is nothing but fantasy and sensationalism. But you know, it's an "excuse" why the original Big Bang prediction was a bust. Couldn't account for all the gaps, splits, pockets, etc... in CMB, so make up something to account for it that can't be disproven due to the inability to observe it directly. Not drinking the Kool-Aid on this one.
Whatever happened to the conversation about intelligence?
Anyway, yes "Dark Matter" is a placeholder name until more info about the thing comes through.
So far, it is only known that there is something producing large scale influence on the trajectories of galaxies... apparently through gravity, so matter is the best description we have for it (because mass is the thing that produces gravity, you know?). We can't see any light coming from it, so dark also fits. And that's it.