MOND gravity, an explanation please.

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Discussion Overview

The discussion centers around Modified Newtonian Dynamics (MOND), particularly its implications for galaxy rotation, its differences from traditional gravitational models, and its acceptance within the scientific community. Participants seek clarification on the mathematical aspects, the problems MOND aims to address, and its standing among physicists.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant requests a mathematical comparison between MOND and the inverse-square law.
  • Another participant mentions that MOND serves as an alternative to dark matter halos for explaining galaxy rotation but notes its limitations in large-scale structures.
  • There is a suggestion to explore related topics, such as the "Pioneer Anomaly," which may provide additional context, although it does not directly answer the original questions.
  • A participant expresses uncertainty about the concept of metric skew tensor gravity and its relation to MOND.

Areas of Agreement / Disagreement

Participants express varying levels of understanding and uncertainty regarding MOND, with some acknowledging its potential while others highlight its limitations. No consensus is reached on its validity or acceptance within the scientific community.

Contextual Notes

Participants have not fully defined the assumptions underlying MOND or the specific mathematical formulations involved. The discussion reflects a mix of exploratory inquiries and technical challenges without resolving the complexities of the theory.

Who May Find This Useful

This discussion may be of interest to those exploring alternative gravitational theories, the role of dark matter in cosmology, and the ongoing debates within astrophysics regarding galaxy dynamics.

Chaos' lil bro Order
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Greetings,

I've heard something to the effect that MOND can explain the rotation of galaxies, but the article was very fuzzy.

Can someone please explain to me MOND...

1) How is MOND different from the inverse-square law? (math please)

2) What 'problems' in science does MOND address and what solutions does it offer?

3) How serious does the scientific community take MOND and who are the main proponents of the theory?


Thanks a bunch guys, I'm excitedly awaiting replies.
 
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Have a browse of the "Pioneer Anomaly" thread, Chaos. It won't answer your question directly, but there's some interesting related stuff in there.

https://www.physicsforums.com/showthread.php?t=121897

I still don't know what metric skew tensor gravity is. Maybe it's to do with massive rotating masses generating more gravity because of frame drag or something. Not sure.
 
Last edited:
MOND is an alternative to the dark matter halos proposed to explain the rotational velocity of the arms in most galaxies. It mostly fails when applied to large scale structures. The MOND conjecture, however, has not yet been disproven, merely that it works no better than existing models.
 

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