Jump to content
Join the Unexplained Mysteries community today! It's free and setting up an account only takes a moment.
- Sign In or Create Account -

Dark Matter Did Not Dominate Early Galaxies


Claire.

Recommended Posts

Dark Matter Did Not Dominate Early Galaxies

A new study finds the mysterious substance was at most a minor constituent of large galaxies in the early universe

Although the invisible substance known as dark matter dominates galaxies nowadays, it was apparently only a minor ingredient of galaxies in the early universe, a new study finds. This new finding sheds light on how galaxies and their mysterious "haloes" of dark matter have changed over time, researchers said.

Read more: Scientific American

  • Like 2
Link to comment
Share on other sites

 

Interesting. I guess that Erik Verlinde's theory on emergent gravity, which I have found interesting, is wrong then because there would be no reason for dark matter to increase with time with that theory as far as I understand.

Dark matter is one of the most fascinating things I know of since it is so ghostlike, invisible and doesn't interact with ordinary matter.

Edited by fred_mc
  • Like 1
Link to comment
Share on other sites

8 hours ago, kartikg said:

can it be that dark matter came from a 

different big bang? 

Interesting idea. I think if the extra gravitation we attribute to dark matter would be coming from a parallel universe (perhaps from real matter in a parallel universe), the big bang for that parallel universe would be a separate big bang. I've seen in science documentaries that gravitons can according to string theory possibly pass through the membranes between parallel universes. However, when I google, I can see that scientists have already thought about the idea that the extra gravitation could come from a parallel universe rather than from dark matter in our universe, and discarded that idea. I don't know enough physics to understand the motivation behind it but it seemed well thought through anyway.

  • Like 2
Link to comment
Share on other sites

7 hours ago, fred_mc said:

Interesting idea. I think if the extra grav, itation.  we attribute to dark matter would be coming from a parallel universe (perhaps from real matter in a parallel universe), the big bang for that parallel universe would be a separate big bang. I've seen in science documentaries that gravitons can according to string theory possibly pass through the membranes between parallel universes. However, when I google, I can see that scientists have already thought about the idea that the extra gravitation could come from a parallel universe rather than from dark matter in our universe, and discarded that idea. I don't know enough physics to understand the motivation behind it but it seemed well thought through anyway.

I am not aware of the gravitational effects diet to parallel universes, my thinking was like big bang within our own universe spewing out dark matter

  • Like 1
Link to comment
Share on other sites

19 minutes ago, kartikg said:

I am not aware of the gravitational effects diet to parallel universes, my thinking was like big bang within our own universe spewing out dark matter

Hmmm, I don't think it works like that. Big bang gave rise to space-time, which has been expanding since then. I don't think there can be another big bang inside of our universe since space-time is already here, another big bang would in that case give rise to another space-time, which would be another universe, I think. I think you're thinking about an explosion inside of our space-time/universe giving rise to dark matter but big bang is not an explosion inside of space-time but something giving rise to space-time itself, and its expansion.

Edited by fred_mc
  • Like 1
Link to comment
Share on other sites

Just now, fred_mc said:

Hmmm, I don't think it works like that..  Big bang gave rise to space-time, which has been expanding since then. I don't think there can be another big bang inside of our universe since space-time is already here, another big bang would in that case give rise to another space-time, which would be another universe, I think. I think you're thinking about an explosion inside of our space-time/universe giving rise to dark matter but big bang is not an explosion inside of space-time but something giving rise to space-time itself, and its expansion.

Yes I was thinking just like that explosion within an explosion. 

Link to comment
Share on other sites

Is dark matter even a thing?  I was under the impression it was more or less a placeholder for a force we couldn't figure out.

  • Like 1
Link to comment
Share on other sites

On 3/18/2017 at 2:26 PM, fred_mc said:

Interesting. I guess that Erik Verlinde's theory on emergent gravity, which I have found interesting, is wrong then because there would be no reason for dark matter to increase with time with that theory as far as I understand.

Dark matter is one of the most fascinating things I know of since it is so ghostlike, invisible and doesn't interact with ordinary matter.

Or, was it just as prevalent but not as condensed around galaxies yet?

Link to comment
Share on other sites

On 3/21/2017 at 11:08 AM, aquatus1 said:

Is dark matter even a thing?  I was under the impression it was more or less a placeholder for a force we couldn't figure out.

It has always felt a bit like Newton's Aether to me. 

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.