Distribution and proportion of dark matter in galaxies

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Discussion Overview

The discussion focuses on the distribution and proportion of dark matter in galaxies, particularly comparing regular-size galaxies to dwarf galaxies. Participants explore theoretical aspects and uncertainties surrounding dark matter's prevalence relative to regular matter.

Discussion Character

  • Exploratory, Debate/contested, Conceptual clarification

Main Points Raised

  • One participant notes that the distribution and proportion of dark matter differs between regular-size galaxies and dwarf galaxies, seeking elaboration on this topic.
  • Another participant mentions a theory suggesting that dark matter could constitute 99 percent of the universe, but expresses uncertainty about our current understanding relative to regular matter.
  • A different participant claims that dark matter covers 96 percent of the universe, indicating a discrepancy in estimates.
  • One participant suggests that the actual proportion of dark matter could be significantly less, depending on the accuracy of existing theories, and raises questions about our understanding of gravity on larger scales.

Areas of Agreement / Disagreement

Participants express differing views on the proportion of dark matter in the universe, with no consensus reached on its exact distribution or the accuracy of current theories.

Contextual Notes

The discussion highlights uncertainties regarding the definitions and measurements of dark matter, as well as the limitations of current theoretical frameworks in explaining its behavior on large scales.

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I read that the distribution and proportion of dark matter to regular matter is different for regular-size galaxies and dwarf galaxies. Could you guys elaborate on that?
 
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the theory is that dark matter could cover 99 percent of our universe, but today i don't think we know much about it relative to regular matter.
 
I thought it covered 96%
 
It could be a lot less depending on how innaccurate our theories are.

We don't really know for sure how gravity works on larger scales.
 

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