My Photo

Tip Jar

Share The Love

Tip Jar
Bookmark and Share

« Were The Earliest Stars Already Black Holes? | Main | Sun Predicted To Be More Active Than Last 400 Years »



My understanding of what this dark matter might really be is that it may simply be relatively "ordinary" matter that does not interact with electric charge, magnetism, strong or weak nuclear forces, etc., but only with the gravitational force. So it may simply be "pure mass." Since it does not interact with these forces, it would not "cloud" our view of other "ordinary" events behind it, except that it would exhibit gravitational lens effects. I suppose clouds of it could increase the mass of stellar objects, inducing novas, and things like that.

Elaine Meinel Supkis

We can't see the future because we can't see the same thing in the past.

We can't 'see' the Big Bang directly nor the period of 'Darkness' that lasted rather a long time...we can't see the things we are falling into, either. They are invisible for whatever reason.

Thinking about the universe as a dual-loop system is quite different from thinking about it as things flying away from each other as fast as possible.


Now *this*... is a good article! Thank you, Elaine!

"But the question really is, what the hell drew not just one stream of millions of galaxies but two streams, into one spot?"

How about plain old random motion? There's enough stuff floating around out there so that there's a 100% chance that some of it it going to collide from time to time.

"My understanding of what this dark matter might really be is that it may simply be relatively "ordinary" matter..."

That may actually be pretty close to it. Current thinking is that much "dark matter" may just be... matter, in the form of objects ranging from asteroid-sized to plantoid-sized moving around in interstellar space. Really small, really far away, not radiating ("dark", that is)... You'd never know they were there.

Elaine Meinel Supkis

Smith, hate to tell you this, but stuff isn't RANDOMLY floating around, it is DIRECTIONAL. Moving in specific ways! If it was random, it still will end up falling towards the biggest objects. So that still makes it directional.

It is hard 'seeing' things when they are invisible and nothing is more invisible than time. We can see the effects of time but can't see 'it' itself.


Try this thought experiment.

Place some massive objects with no initial momnetum on the perimeter of a large imaginary circle. Their mutual gravitational pull would draw them closer together make a smaller ring that eventually collapses to a point. This would give the appearance of the massive objects being drawn towards a central attractor where there is no mass. The objects are simply moving towards the centre of mass of the system as a whole and there does not have to be any mass at that centre.

The comments to this entry are closed.