It's dark, but does it matter?
Here's a little sidetrack, unrelated to much of anything else I write.
I don't know why I think about these things; no doubt something I read stuck in my head and got wheels turning.
It's about "Dark Matter". You, know, the "stuff" that the evidence points to as making up most of the Universe, but which can't be detected in normal ways (other than observing its apparent gravitational effects on a galactic scale and above).
What is the evidence for dark matter?
Could all those pieces of evidence be explained by a force divorced from matter? Maybe a result of the natural topography (on a large scale) of spacetime itself, rather than a sign of something else sitting in it?
Maybe it's a force which mimics gravity, but isn't a spacetime curvature caused by matter. In other words, it acts very much like gravity, but isn't gravity.
Maybe it's a type of "orphan gravity".
No, I don't know. I'm not smart enough to know, haven't had the training to know, and probably don't have time (or the ability/equipment) to figure it out.
It probably doesn't matter, anyway. It's just one of those things I think about.
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An unidentified new force makes no less sense than an unidentified new form of matter.
Yes, that "dark matter" nonsense has always bugged me. It's exactly as if the so-called "highly trained experts" have NO FREAKIN' CLUE what it is. But they've still got the hubris to pretend that they do. And instead of just admitting that they're clueless, they give it a name that may or may not have anything to do with reality! Silly little humans...
It's obvious that something is affecting the shape and rotation of galaxies, but... what?
"We'll just call it 'dark matter'."