matter or not matter ?

Observable Universe contains ten times more galaxies than previously thought
says in this place:
http://phys.org/news/2016-10-universe-te...

So for those who are informed, what does that do to dark matter? Do we sitll need it to balance the books ?

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Kat's picture
Member since:
1 May 2004
Last activity:
9 weeks 3 days

I don't know how well informed I am, but one of the problems is, there isn't enough visible matter to hold galaxies together, so the theory is, there must be some sort of dark - i.e. invisible - matter that we can't see/detect.

If they've suddenly discovered there are ten times more galaxies, physicists now need to find ten times more dark matter to hold each of those new galaxies together too.

Or develop more-refined observational instruments.

Or discover that thoughts are things.

earthling's picture
Member since:
22 November 2004
Last activity:
23 hours 34 min

Holding galaxies together, I missed that part.

Another possibility for this being an instrumentation problem, I think, is red shift. We are assuming that light is red-shifted by speed and (thus) distance, Suppose that the empty space between us and the other galaxies is not as empty as we think it is. That may affect the red shift that we are seeing, leading to measurement inaccuracies.

The main problem I have with dark matter and dark energy is that we ha have the stndard model, and observations. e can quantify by how much the model predictions are wrong. So is it missing matter and energy, or is the model wrong ?

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We are the cat.