This Sunday’s (3/11/07) NY Times Magazine has a really interesting piece titled “Out There.” It’s a sort of a recap of the current state-of-the-state of cosmologic research. You may remember I recently posted my wild hypothesis that perhaps dark matter is really what we call “consciousness,” or “the soul,” or one of those other terms that we give to things that are demonstrable but impossible (at least at this point) to understand.
I’m going to attempt to provide a synopsis of some of the key points of the article. But it’s only fair to provide the standard warning label:
DANGER: I AM GOING TO TAKE MORE LIBERTIES WITH THE SCIENCE OF THIS THING THAN YOU MAY BE COMFORTABLE WITH. AFTER ALL, I AM A POET/PHILOSOPHER, NOT A COSMOLOGIST. IF AT ANY TIME YOUR COMFORT LEVEL IS EXCEEDED, STOP READING IMMEDIATELY AND GO GET A GLASS OF SOMETHING COLD, YOUR CHOICE.
Here are some of the current beliefs. Since I think it’s impossible to “know” any of this (and I think the number of reversals over the history of natural science bears my thinking out), I am going to lump “facts” and theories together.
Only about 4% of the mass of the known universe is the type of matter we are made of, our planets and stars are made of, and with which we are familiar.
About 22% of the total mass is something currently called “dark matter.”
The remaining 74% is classified as “dark energy.” This isn’t necessarily energy as we think about it but an “energy-like” substance, whatever that means.
The term “dark” in this usage has nothing to do with color or brightness. It refers to the fact that these substances, whatever they are, are nonbaryonic. They do not interact with electricity or magnetism (as far as we can tell), or with photons or electrons, and thus we are unable to “see” them. But they make up 96% of the known universe.
To paraphrase one scientist, we and all of things we know anything about are merely a bit of pollution in the universe. Most of the universe is not only something about which we know nothing but something that we can’t even be sure we know how to know anything about. Time for a cold drink yet?
Then there’s gravity. Gravity is a commonly accepted phenomenon. If you let go of that cold drink, it will fall “down” and spill. But nobody really knows why. What gravity really is remains a huge mystery, despite the fact that it has been an acknowledged phenomenon for several centuries.
The theory of gravity says that the elements of the universe should be drawing closer together based on the attraction of one mass for another. But in fact, just the opposite is happening. Enter dark energy.
Dark energy is a sort of anti-gravity force that pushes things apart. In fact, the universe appears to be expanding, which would indicate that dark energy is stronger than gravity. But no one really understands what either force is.
The universe is made up of many, many galaxies. These galaxies are spinning at a very high rate of speed which should cause the stars and their ancillary satellites to fly off farther from the core based on another principle of physics, the principle of centrifugal force.
But that’s not happening either. Current speculation says that galaxies hold together because of dark matter. Science has detected “clouds” of dark matter around various galaxies. But once again, no one knows what dark matter is.
Einstein is best known for his “theory of general relativity.” But let’s not forget that he spent the last 30 years of his life attempting to reconcile his theory with the emerging field of quantum theory, without success. Maybe we’re just not meant to know these things. And maybe it’s best that way. It leaves room for poetry alongside science.
I love cosmology, and I struggle with my limited little brain to understand as much as I can. But I think I still prefer poetry.
Now my head hurts from all of this thinking, and I’m going to head off to bed.