First off, I must confess a great deal of ignorance about what I am about to talk about. If someone can correct me, I’d appreciate it (I have an unrelated question, too, here).
I had an idea one day concerning the origin of the influence upon the measurable universe that we have come to calling “dark matter”. I hope it’s not too much to ask to ask the reader to follow the following dense narrative. If you’re not interested, then I suggest you skip this one. There’s going to be a lot of “thought experiment” (and hopefully “revelation”), if that helps to tip the scales. (reading over this a day later, it’s different than any other post)
As we look out into outer space, including interplanetary space, we are looking into the past (the Sun’s light is roughly seven minutes old [if the Sun blew up we’d know about it seven minutes later]). The electromagnetic radiation that bathes us from space reveals the state of affairs of its source, not in the present moment, but in the past. Radiating bodies that are very far away may appear to us in a guise millions of years old. They may not even be there anymore. Most of us know this.
Imagine that place in space that the Earth occupies right now. It’s already moved. Anyway, predicting the path of the Earth, I imagine, is quite complicated if one is willing to take into consideration as many factors as possible. We have the Earth wobbling on its axis as it revolves. It orbits the sun. The sun orbits the galactic center, which itself moves in relation to local galaxies. All locked in motion around ever greater agglomerations. Just zipping through space.
And, as we move, we intercept electromagnetic radiation emitted from distant stars, galaxies, and other celestial emitters. If one wants to get really serious about it, the reality is that the relation of our present to the distant present whose radiation we are detecting is constantly changing as all those summed motions of the Earth change our exact position in relation to the emitting celestial body. Yet more music of the spheres. This slight variation, while important to recognize, is of no further importance to our discussion.
It stands to reason that the radiation from farther and farther away will take longer and longer to arrive at the point in space which our movement is about to take us (actually, we’ll be moving away from some radiation and towards other radiation and in parallel with still other radiation). May it not be that those regions of space that are even farther from us than the farthest we can see could contain celestial emitters emitting light even now, light that we won’t be able to see until many many years from now, when we enter a region of space that the farthest boundaries of its radiation have reached.
There are two nows: our visible now and our objective now. If our objective now contains significantly more celestial bodies than our visible now, then might not that collective gravitational force influence the amount of “dark matter” that we have to resort to to make our equations work? While this may not seem to make sense at first, since the gravitational force takes time to “expand” as well, and distant bodies would have yet to influence us gravitationally, perhaps it is significant that things very far away from us will be effected by gravitational force that hasn’t reached our region yet. And so the universe is stitched together (if my reasoning isn’t superseded by some other more reasoned reasoning). Meet Dark Matter (certainly conforms to the meaning of the adjective “dark”). And so our universe becomes a vast system of stitching its bodies together from gravitational waves (or whatever).
Could we see celestial bodies emerge into view from very far away a long time ago? Perhaps the night sky is filling up with stars? Or perhaps it’s a steady state as celestial emitters blink out and pop into view.
I’m just guessing here. Anyone see anything blatantly absurd? Any ideas?